chore: run dessant/label-actions on discussions (#12037)

.github/workflows/label-actions.yml

@@ -3,10 +3,13 @@ name: 'Label Actions'
 on:
   issues:
     types: [labeled]
+  discussion:
+    types: [labeled]
 
 permissions:
   contents: read
   issues: write
+  discussions: write
 
 jobs:
   reaction:
@@ -15,4 +18,4 @@ jobs:
       - uses: dessant/label-actions@93ea5ec1d65e6a21427a1571a18a5b8861206b0b # renovate: tag=v2.2.0
         with:
           github-token: ${{ github.token }}
-          process-only: 'issues'
+          process-only: 'issues, discussions'