[CI] another variant

Author: glpatcern

.github/workflows/build-and-publish.yml

@@ -37,8 +37,8 @@ jobs:
           git config user.name "cernbox-bot"
           cp ../grpc-proto/build/*.go .
           git add .
-          done=$(git commit -m "Synced to https://github.com/cern-eos/grpc-proto/tree/${{ github.sha }}")
-          if [[ $done -eq 0 ]]; then
+          git commit -m "Synced to https://github.com/cern-eos/grpc-proto/tree/${{ github.sha }}"
+          if [ $? -eq 0 ]; then
             git push origin main
           else
             echo "The committed changes (if any) did not update the protobufs, nothing more to do"