Exempt gfi issues from stale issues bot

Author: njgheorghita

.github/workflows/stale.yml

@@ -18,5 +18,5 @@ jobs:
           close-issue-message: "This issue was closed because it has been inactive for 14 days since being marked as stale."
           days-before-pr-stale: -1
           days-before-pr-close: -1
-          exempt-issue-labels: "shelf-stable"
+          exempt-issue-labels: "shelf-stable,good-first-issue,flamingo"
           repo-token: ${{ secrets.GITHUB_TOKEN }}