fix git grep

.gitea/workflows/gentoo-utils.yml

@@ -193,7 +193,7 @@ jobs:
       - name: grep for patterns
         # negate git grep ret code because 1 means no findings
         run: |
-          if git --no-pager grep -E 'todo!|dbg!' -- '*.rs'; then
+          if ! git --no-pager grep -E 'todo!|dbg!' -- '*.rs'; then
             exit 0
           else
             exit 1