Correct the TypeModifier enum comment

Author: wravery

include/graphqlservice/GraphQLService.h

@@ -199,9 +199,9 @@ class Base64
 	static char verifyToBase64(uint8_t i);
 };
 
-// Types be wrapped non-null or list types in GraphQL. Since nullability is a more special case
-// in C++, we invert the default and apply that modifier instead when the non-null wrapper is
-// not present in that part of the wrapper chain.
+// Default-nullable types may be wrapped non-null or list types in GraphQL. Since nullability is
+// a more special case in C++, we invert the default and apply that modifier instead when the
+// non-null wrapper is not present in that part of the wrapper chain.
 enum class TypeModifier
 {
 	None,