build(deps): bump korthout/backport-action from 2.0.0 to 2.1.1 (#3077)

Bumps [korthout/backport-action](https://github.com/korthout/backport-action) from 2.0.0 to 2.1.1.
- [Release notes](https://github.com/korthout/backport-action/releases)
- [Commits](https://github.com/korthout/backport-action/compare/v2.0.0...v2.1.1

)

---
updated-dependencies:
- dependency-name: korthout/backport-action
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/backport.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
       - uses: actions/checkout@v4
       - name: Create backport PRs
-        uses: korthout/backport-action@v2.0.0
+        uses: korthout/backport-action@v2.1.1
         with:
           # Config README: https://github.com/korthout/backport-action#backport-action
           pull_description: |-