fix(grpc): Rename push_notification to push_notification_config (#1091)

Author: powmax-commits

docs/specification.md

@@ -697,6 +697,8 @@ The `error` response for all transports in case of failure is a [`JSONRPCError`]
 
 {{ render_spec_tabs('MessageSendParams') }}
 
+#### 7.1.2 `MessageSendConfiguration` Object
+
 {{ render_spec_tabs('MessageSendConfiguration') }}
 
 ### 7.2. `message/stream`

specification/grpc/a2a.proto

@@ -118,7 +118,7 @@ message SendMessageConfiguration {
   // The output modes that the agent is expected to respond with.
   repeated string accepted_output_modes = 1;
   // A configuration of a webhook that can be used to receive updates
-  PushNotificationConfig push_notification = 2;
+  PushNotificationConfig push_notification_config = 2;
   // The maximum number of messages to include in the history. if 0, the
   // history will be unlimited.
   int32 history_length = 3;