fix git grep

.gitea/workflows/gentoo-utils.yml

@@ -191,9 +191,11 @@ jobs:
         uses: actions/checkout@v5
 
       - name: grep for patterns
+        # negate git grep ret code because 1 means no findings
         run: |
-          set -x
-          git --no-pager grep -E 'todo!|dbg!' -- '*.rs'
-          retcode=$?
-          echo "retcode=$?"
-          (( $retcode )) && echo "exit 1" || echo "exit 0"
+          if git --no-pager grep -E 'todo!|dbg!' -- '*.rs'; then
+            exit 0
+          else
+            exit 1
+          fi
+