Update backport workflow to use new reusable file version (#1405)

Author: linawolf

.github/workflows/backport.yml

@@ -12,7 +12,7 @@ permissions:
 
 jobs:
   backport:
-    uses: TYPO3-Documentation/.github/.github/workflows/reusable-backport.yml@161f3bed5308099b67674e3e9d5a735e02500b24
+    uses: TYPO3-Documentation/.github/.github/workflows/reusable-backport.yml@46ed94fb7c10facf478883acfa1c0ecbe55f198b
     with:
       label_pattern: "^backport (.+)$"
     secrets: