Fix variadic CFrame methods (#726)

## Changes

These methods are not fully documented as being variadic.

I don't know how to correctly document a variadic return when all
returned values have known type, and didn't find examples, so I went
with Luau's type syntax `...CFrame`. Please tell me if this should
instead be `Variant` or something else.

## Checks

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- [x] This contribution was created in whole or in part by me, and I
have the right to submit it under the terms of this repository's open
source licenses.
- [x] I understand and agree that this contribution and a record of it
are public, maintained indefinitely, and may be redistributed under the
terms of this repository's open source licenses.
- [x] To the best of my knowledge, all proposed changes are accurate.

---------

content/en-us/reference/engine/datatypes/CFrame.yaml

@@ -743,120 +743,108 @@ methods:
     deprecation_message: ''
   - name: CFrame:ToWorldSpace
     summary: |
-      Returns one or more `Datatype.CFrame` objects transformed from object to
-      world space.
+      Receives one or more `Datatype.CFrame` objects and returns them transformed from object to world space.
     description: |
-      Returns one or more `Datatype.CFrame` objects transformed from object to
-      world space. Equivalent to:
+      Receives one or more `Datatype.CFrame` objects and returns them transformed from object to world space. Equivalent to:
 
       `CFrame * cf`
     parameters:
-      - name: cf
-        type: CFrame
+      - name: ...
+        type: Tuple<CFrame>
         default:
         summary: ''
     returns:
-      - type: CFrame
+      - type: Tuple<CFrame>
         summary: ''
     code_samples: []
     tags: []
     deprecation_message: ''
   - name: CFrame:ToObjectSpace
     summary: |
-      Returns one or more `Datatype.CFrame` objects transformed from world to
-      object space.
+      Receives one or more `Datatype.CFrame` objects and returns them transformed from world to object space.
     description: |
-      Returns one or more `Datatype.CFrame` objects transformed from world to
-      object space. Equivalent to:
+      Receives one or more `Datatype.CFrame` objects and returns them transformed from world to object space. Equivalent to:
 
       `CFrame:Inverse() * cf`
     parameters:
-      - name: cf
-        type: CFrame
+      - name: ...
+        type: Tuple<CFrame>
         default:
         summary: ''
     returns:
-      - type: CFrame
+      - type: Tuple<CFrame>
         summary: ''
     code_samples: []
     tags: []
     deprecation_message: ''
   - name: CFrame:PointToWorldSpace
     summary: |
-      Returns one or more `Datatype.Vector3` objects transformed from object to
-      world space.
+      Receives one or more `Datatype.Vector3` objects and returns them transformed from object to world space.
     description: |
-      Returns one or more `Datatype.Vector3` objects transformed from object to
-      world space. Equivalent to:
+      Receives one or more `Datatype.Vector3` objects and returns them transformed from object to world space. Equivalent to:
 
       `CFrame * v3`
     parameters:
-      - name: v3
-        type: Vector3
+      - name: ...
+        type: Tuple<Vector3>
         default:
         summary: ''
     returns:
-      - type: Vector3
+      - type: Tuple<Vector3>
         summary: ''
     code_samples: []
     tags: []
     deprecation_message: ''
   - name: CFrame:PointToObjectSpace
     summary: |
-      Returns one or more `Datatype.Vector3` objects transformed from world to
-      object space.
+      Receives one or more `Datatype.Vector3` objects and returns them transformed from world to object space.
     description: |
-      Returns one or more `Datatype.Vector3` objects transformed from world to
-      object space. Equivalent to:
+      Receives one or more `Datatype.Vector3` objects and returns them transformed from world to object space. Equivalent to:
 
       `CFrame:Inverse() * v3`
     parameters:
-      - name: v3
-        type: Vector3
+      - name: ...
+        type: Tuple<Vector3>
         default:
         summary: ''
     returns:
-      - type: Vector3
+      - type: Tuple<Vector3>
         summary: ''
     code_samples: []
     tags: []
     deprecation_message: ''
   - name: CFrame:VectorToWorldSpace
     summary: |
-      Returns one or more `Datatype.Vector3` objects rotated from object to
-      world space.
+      Receives one or more `Datatype.Vector3` objects and returns them rotated from object to world space.
     description: |
-      Returns one or more `Datatype.Vector3` objects rotated from object to
-      world space. Equivalent to:
+      Receives one or more `Datatype.Vector3` objects and returns them rotated from object to world space. Equivalent to:
 
       `(CFrame - CFrame.Position) * v3`
     parameters:
-      - name: v3
-        type: Vector3
+      - name: ...
+        type: Tuple<Vector3>
         default:
         summary: ''
     returns:
-      - type: Vector3
+      - type: Tuple<Vector3>
         summary: ''
     code_samples: []
     tags: []
     deprecation_message: ''
   - name: CFrame:VectorToObjectSpace
     summary: |
-      Returns one or more `Datatype.Vector3` objects rotated from world to
-      object space.
+      Receives one or more `Datatype.Vector3` objects and returns them rotated from world to object space.
     description: |
-      Returns one or more `Datatype.Vector3` objects rotated from world to
-      object space. Equivalent to:
+      Receives one or more `Datatype.Vector3` objects and returns them rotated from world to object space. Equivalent to:
 
       `(CFrame:Inverse() - CFrame:Inverse().Position) * v3`
     parameters:
-      - name: v3
-        type: Vector3
+      - name: ...
+        type: Tuple<Vector3>
         default:
         summary: ''
     returns:
-      - type: Vector3
+      - type: Tuple<Vector3>
         summary: ''
     code_samples: []
     tags: []