keep separate auto-label workflow

.github/workflows/auto-label.yaml

@@ -0,0 +1,17 @@
+name: auto-label
+concurrency:
+  group: ${{ github.workflow }}-${{ github.event.number }}-${{ github.event.ref }}
+  cancel-in-progress: true
+on:  # yamllint disable-line rule:truthy
+  pull_request_target
+
+jobs:
+  pr:
+    permissions:
+      contents: read
+      pull-requests: write
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/labeler@v5
+        with:
+          configuration-path: .github/labeler.yaml

.github/workflows/bot.yaml

@@ -19,10 +19,3 @@ jobs:
         env:
           PR_URL: ${{ github.event.pull_request.html_url }}
           GH_TOKEN: ${{ secrets.GITHUB_TOKEN }}
-
-  auto-label:
-    runs-on: ubuntu-latest
-    steps:
-      - uses: actions/labeler@v5
-        with:
-          configuration-path: .github/labeler.yaml