Bump actions/stale from 7 to 8 (python-telegram-bot#3644)

dependabot[bot] · web-flow · commit 7ab2cafbee6b · 2023-04-02T21:41:37.000+02:00
diff --git a/.github/workflows/stale.yml b/.github/workflows/stale.yml
@@ -7,7 +7,7 @@ jobs:
   stale:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/stale@v7
+      - uses: actions/stale@v8
         with:
           # PRs never get stale
           days-before-stale: 3
