Fix incorrect prefix

Author: benjie

spec/Section 6 -- Execution.md

@@ -28,7 +28,7 @@ formatted according to the Response section below.
 
 Note: Previous versions of this specification did not define the {onError}
 request attribute. Clients can detect support for {onError} by checking for the
-{"org.graphql.onError"} capability. If this capability is not present, or if
+{"graphql.onError"} capability. If this capability is not present, or if
 capabilities themselves are not supported by introspection, then clients should
 not include {onError} in the request and must assume the _error behavior_ is
 {"PROPAGATE"}.
@@ -946,7 +946,7 @@ Valid values for _error behavior_ are {"NULL"}, {"PROPAGATE"} and {"HALT"}.
 :: The _default error behavior_ of a service is implementation-defined. For
 compatibility with existing clients, services should default to {"PROPAGATE"}
 which reflects prior behavior. <!-- For new services, {"NULL"} is
-recommended. --> The default error behavior is indicated via the {"org.graphql.defaultErrorBehavior"}
+recommended. --> The default error behavior is indicated via the {"graphql.defaultErrorBehavior"}
 _service capability_.
 
 Note: {"HALT"} is not recommended as the _default error behavior_ because it