update docs

.github/docs/openapi3.txt

@@ -827,6 +827,7 @@ type Location struct {
 	Line   int `json:"line,omitempty" yaml:"line,omitempty"`
 	Column int `json:"column,omitempty" yaml:"column,omitempty"`
 }
+    Location is a struct that contains the location of a field.
 
 type MediaType struct {
 	Extensions map[string]any `json:"-" yaml:"-"`
@@ -1025,6 +1026,9 @@ type Origin struct {
 	Key    *Location           `json:"key,omitempty" yaml:"key,omitempty"`
 	Fields map[string]Location `json:"fields,omitempty" yaml:"fields,omitempty"`
 }
+    Origin contains the origin of a collection. Key is the location of the
+    collection itself. Fields is a map of the location of each field in the
+    collection.
 
 type Parameter struct {
 	Extensions map[string]any `json:"-" yaml:"-"`