Update docs/types/objecttypes.rst

Co-Authored-By: Jonathan Kim <[email protected]>

Author: dvndrsn

docs/types/objecttypes.rst

@@ -380,7 +380,7 @@ Interfaces & Possible Types
 
 Setting ``interfaces`` in Meta inner class specifies the GraphQL Interfaces that this Object implements.
 
-Providing ``possible_types`` helps Graphene resolve ambiguous types such as interfaces or Unions.
+Providing ``possible_types`` helps Graphene resolve ambiguous types such as Interfaces or Unions.
 
 See :ref:`Interfaces` for more information.