build(deps): bump korthout/backport-action from 2.5.0 to 3.0.0

Bumps [korthout/backport-action](https://github.com/korthout/backport-action) from 2.5.0 to 3.0.0.
- [Release notes](https://github.com/korthout/backport-action/releases)
- [Commits](korthout/backport-action@ef20d86...7e7cb19)

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

Signed-off-by: dependabot[bot] <[email protected]>

.github/workflows/backport.yml

@@ -24,7 +24,7 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.sha }}
       - name: Create backport PRs
-        uses: korthout/backport-action@ef20d86abccbac3ee3a73cb2efbdc06344c390e5 # v2.5.0
+        uses: korthout/backport-action@7e7cb1977d64d20339e8fdec12c0a1a065371de7 # v3.0.0
         with:
           # Config README: https://github.com/korthout/backport-action#backport-action
           branch_name: backport/${pull_number}-to-${target_branch}