Add Placement Groups LA disclaimer (#422)

linode_api4/groups/placement.py

@@ -9,6 +9,8 @@
 class PlacementAPIGroup(Group):
     def groups(self, *filters):
         """
+        NOTE: Placement Groups may not currently be available to all users.
+
         Returns a list of Placement Groups on your account.  You may filter
         this query to return only Placement Groups that match specific criteria::
 
@@ -34,6 +36,8 @@ def group_create(
         **kwargs,
     ) -> PlacementGroup:
         """
+        NOTE: Placement Groups may not currently be available to all users.
+
         Create a placement group with the specified parameters.
 
         :param label: The label for the placement group.

linode_api4/objects/placement.py

@@ -28,6 +28,8 @@ class PlacementGroupMember(JSONObject):
 
 class PlacementGroup(Base):
     """
+    NOTE: Placement Groups may not currently be available to all users.
+
     A VM Placement Group, defining the affinity policy for Linodes
     created in a region.