Bump tibdex/backport from 2.0.3 to 2.0.4

Bumps [tibdex/backport](https://github.com/tibdex/backport) from 2.0.3 to 2.0.4.
- [Release notes](https://github.com/tibdex/backport/releases)
- [Commits](tibdex/backport@2e21764...9565281)

---
updated-dependencies:
- dependency-name: tibdex/backport
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

.github/workflows/backport.yml

@@ -24,6 +24,6 @@ jobs:
         )
       )
     steps:
-      - uses: tibdex/backport@2e217641d82d02ba0603f46b1aeedefb258890ac # v2.0.3
+      - uses: tibdex/backport@9565281eda0731b1d20c4025c43339fb0a23812e # v2.0.4
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}