check for compile diffs

Author: alessio-perugini

Diff for: .github/workflows/check-protobuf-task.yml

@@ -61,7 +61,7 @@ jobs:
       - name: Install protoc compiler
         uses: arduino/setup-protoc@28fd3e5ddcc4ae8820e0c2085bfea8ab68f631e3
         with:
-          version: v23.2
+          version: v21.12
           repo-token: ${{ secrets.GITHUB_TOKEN }}
 
       - name: Install Go deps
@@ -77,7 +77,9 @@ jobs:
 
       - name: Check protocol buffers compile correctly
         if: runner.os == 'Linux'
-        run: task protoc:compile
+        run: |
+          task protoc:compile
+          git diff --color --exit-code
 
   check:
     needs: run-determination