Use denobot account for auto-rolling (#992)

.github/workflows/ci.yml

@@ -1,13 +1,14 @@
 name: ci
 
-on: [push, pull_request]
+on: 
+  push:
+    branches: [main]
+  pull_request:
+    branches: [main]
 
 jobs:
   build:
     name: ${{ matrix.config.variant }} ${{ matrix.config.target }}
-    if: |
-      github.event_name == 'push' ||
-      !startsWith(github.event.pull_request.head.label, 'denoland:')
     runs-on: ${{ matrix.config.os }}
     timeout-minutes: 120
     strategy:

.github/workflows/update-v8.yml

@@ -12,6 +12,8 @@ jobs:
     steps:
       - name: Clone repository
         uses: actions/checkout@v3
+      - name: Fetch origin/main
+        run: git fetch origin main
       - uses: denoland/setup-deno@main
         with:
           deno-version: v1.x
@@ -24,4 +26,4 @@ jobs:
           git remote set-url origin https://${{ secrets.DENOBOT_PAT }}@github.com/denoland/rusty_v8.git
       - run: deno run -A ./tools/auto_update_v8.ts
         env:
-          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+          GITHUB_TOKEN: ${{ secrets.DENOBOT_PAT }}