ci: labels sync workflow

Author: lorenzocorallo

.github/workflows/labels-sync.yml

@@ -0,0 +1,20 @@
+# from: https://github.com/PoliNetworkOrg/TheTOLProject/blob/main/.github/workflows/labels-sync.yml
+
+name: Sync labels
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - ".github/labels.yml"
+  workflow_dispatch:
+
+jobs:
+  sync:
+    name: Run EndBug/label-sync
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: EndBug/label-sync@v2
+        with:
+          config-file: ".github/labels.yml"