Bump korthout/backport-action from 3.2.0 to 3.2.1 (#738)

Bumps [korthout/backport-action](https://github.com/korthout/backport-action) from 3.2.0 to 3.2.1.
- [Release notes](https://github.com/korthout/backport-action/releases)
- [Commits](korthout/backport-action@436145e...0193454)

---
updated-dependencies:
- dependency-name: korthout/backport-action
  dependency-version: 3.2.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

.github/workflows/backport.yml

@@ -32,7 +32,7 @@ jobs:
           echo "OLD_BRANCH=${OLD_BRANCH}" >> $GITHUB_ENV
 
       - name: Create backport pull requests
-        uses: korthout/backport-action@436145e922f9561fc5ea157ff406f21af2d6b363  # v3.2.0
+        uses: korthout/backport-action@0193454f0c5947491d348f33a275c119f30eb736  # v3.2.1
         with:
           copy_assignees: true
           copy_labels_pattern: true