ci(autosync): add action for pull upstream (vuejs#122)

* ci(autosync): add action for pull upstream
Commitor: initdc

* Update autosync.yml

Co-authored-by: wxsm <[email protected]>

Author: initdc

.github/workflows/autosync.yml

@@ -0,0 +1,20 @@
+name: Auto Sync
+
+on:
+  schedule:
+    - cron: '0 0 * * *' # At 00:00.  https://crontab.guru/
+  workflow_dispatch: # on button click
+
+jobs:
+  sync:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: TobKed/github-forks-sync-action@master
+        with:
+          github_token: ${{ secrets.UPSTREAM_SYNC_TOKEN }}
+          upstream_repository: vuejs/docs
+          upstream_branch: main
+          target_repository: vuejs-translations/docs-zh-cn
+          target_branch: upstream
+          force: false
+          tags: false