ci: only check for diffs in source code and generated artifacts (at dev time) (#1370)

Author: pandatix

.github/workflows/ci.yaml

@@ -54,7 +54,7 @@ jobs:
 
       - name: Check if Go code has changed
         run: |
-          if git diff --exit-code; then
+          if git diff --exit-code -- '*.go' '*.proto' '*.yaml' '*.json' ':!*.sum'; then
             echo "Generated Go code has not changed."
           else
             echo "Generated Go code has changed. Please make sure to commit the changes."