fix positional argument

Author: ohmayr

gapic/schema/api.py

@@ -1262,7 +1262,7 @@ def proto(self) -> Proto:
                 )
                 for k, v in naive.services.items()
             ),
-            meta=naive.meta.with_context(collisions=naive.names, self.context_cache),
+            meta=naive.meta.with_context(collisions=naive.names, context_cache=self.context_cache),
         )
 
     @cached_property