Merge pull request #9060 from ThomasWaldmann/fix-backport-action

backport action: fix label_pattern

.github/workflows/backport.yml

@@ -37,6 +37,8 @@ jobs:
           startsWith(github.event.comment.body, '/backport')
         )
     steps:
-        -   uses: actions/checkout@v4
-        -   name: Create backport pull requests
-            uses: korthout/backport-action@v3
+        - uses: actions/checkout@v4
+        - name: Create backport pull requests
+          uses: korthout/backport-action@v3
+          with:
+            label_pattern: '^port/(.+)$'