chore(deps): update zeebe-io/backport-action action to v2.5.0

Author: renovate[bot]

.github/workflows/backport.yml

@@ -27,7 +27,7 @@ jobs:
           fetch-depth: 0
 
       - name: Open Backport PR
-        uses: zeebe-io/backport-action@e8161d6a0dbfa2651b7daa76cbb75bc7c925bbf3 # v2.4.1
+        uses: zeebe-io/backport-action@ef20d86abccbac3ee3a73cb2efbdc06344c390e5 # v2.5.0
         with:
           github_token: ${{ secrets.GITHUB_TOKEN }}
           github_workspace: ${{ github.workspace }}