ci: add auto labeller workflow
diff --git a/.github/workflows/labeller.yml b/.github/workflows/labeller.yml
new file mode 100644
index 0000000..0e112f9
--- /dev/null
+++ b/.github/workflows/labeller.yml
@@ -0,0 +1,12 @@
+name: "Pull Request Labeler"
+on:
+- pull_request_target
+
+jobs:
+  triage:
+    runs-on: ubuntu-latest
+    steps:
+    - uses: actions/labeler@v3
+      with:
+        repo-token: "${{ secrets.GITHUB_TOKEN }}"
+        sync-labels: true