fix: Correct gofmt check syntax in GitHub Actions

Author: yxshwanth

.github/workflows/test.yml

@@ -34,5 +34,11 @@ jobs:
     
     - name: Check formatting
       run: |
-        test -z $(gofmt -s -l gateway/ processor/)
+        unformatted=$(gofmt -s -l gateway/ processor/)
+        if [ -n "$unformatted" ]; then
+          echo "Code is not formatted. Run: gofmt -w gateway/ processor/"
+          echo "Unformatted files:"
+          echo "$unformatted"
+          exit 1
+        fi