chore(deps): bump zeebe-io/backport-action from 3.2.1 to 3.4.0

Bumps [zeebe-io/backport-action](https://github.com/zeebe-io/backport-action) from 3.2.1 to 3.4.0.
- [Release notes](https://github.com/zeebe-io/backport-action/releases)
- [Commits](korthout/backport-action@v3.2.1...v3.4.0)

---
updated-dependencies:
- dependency-name: zeebe-io/backport-action
  dependency-version: 3.4.0
  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

@@ -27,7 +27,7 @@ jobs:
           fetch-depth: 0
 
       - name: Open Backport PR
-        uses: zeebe-io/backport-action@v3.2.1
+        uses: zeebe-io/backport-action@v3.4.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           github_workspace: ${{ github.workspace }}

.github/workflows/commands.yml

@@ -24,7 +24,7 @@ jobs:
         fetch-depth: 0
 
     - name: Open Backport PR
-      uses: zeebe-io/backport-action@v3.2.1
+      uses: zeebe-io/backport-action@v3.4.0
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}
         github_workspace: ${{ github.workspace }}