workflows: use make rpc-check in CI

Author: mohamedawnallah

.github/workflows/main.yml

@@ -47,6 +47,9 @@ jobs:
       - name: Check code format
         run: make fmt-check
 
+      - name: Check RPC format
+        run: make rpc-check
+
       - name: compile code
         run: go install -v ./...