[skip-changelog] Correctly remove unneded artifacts (#2682)

The previous 'name' value `${{ env.CONFIGURATIONS_ARTIFACT }}` would not
match the name of the produced intermediate artifacts.
The correct pattern is `${{ env.CONFIGURATIONS_ARTIFACT }}-*`.

.github/workflows/sync-labels.yml

@@ -118,7 +118,7 @@ jobs:
       - name: Remove unneeded artifact
         uses: geekyeggo/delete-artifact@v5
         with:
-          name: ${{ env.CONFIGURATIONS_ARTIFACT }}
+          name: ${{ env.CONFIGURATIONS_ARTIFACT }}-*
 
       - name: Merge label configuration files
         run: |