Bump korthout/backport-action from 4.3.0 to 4.5.0

Bumps [korthout/backport-action](https://github.com/korthout/backport-action) from 4.3.0 to 4.5.0.
- [Release notes](https://github.com/korthout/backport-action/releases)
- [Commits](korthout/backport-action@3c06f32...7c3f6cd)

---
updated-dependencies:
- dependency-name: korthout/backport-action
  dependency-version: 4.5.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

.github/workflows/backport.yml

@@ -17,6 +17,6 @@ jobs:
       - uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v 6.0.2
 
       - name: Backport
-        uses: korthout/backport-action@3c06f323a58619da1e8522229ebc8d5de2633e46 # v4.3.0
+        uses: korthout/backport-action@7c3f6cd5843cac11bc59a04a1b7699af93261670 # v4.5.0
         with:
           github_token: ${{ secrets.GH_PAT }}