add comment

Signed-off-by: a3hadi <[email protected]>

.github/workflows/build-push.yaml

@@ -8,6 +8,8 @@ on:
 
 jobs:
   docker_publish:
+    # run it only on numaproj/numaflow-go repository
+    # forked repositories normally don't have the proper permission setup.
     if: ${{ github.repository }} == "numaproj/numaflow-go"
     name: Build, Tag, and Push Image
     runs-on: ubuntu-latest