Add backup action (#107)

* Add backup action

* Fix the wrong target git repo

.github/workflows/backup.yaml

+name: Backup Git Repo
+
+on:
+  push:
+    branches:
+      - master
+
+jobs:
+  git-repo-backup:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@master
+      - name: git-repo-backup
+        uses: jenkins-zh/git-backup-actions@v0.0.1
+        env:
+          GIT_DEPLOY_KEY: ${{ secrets.GIT_DEPLOY_KEY }}
+          TARGET_GIT: "git@gitee.com:jenkins-zh/localization-zh-cn-plugin.git"
\ No newline at end of file

README.md

@@ -21,3 +21,8 @@ If you are interested in localization, please check [Chinese Localization SIG](h
 All Chinese characters will convert to ASCII. It's hard to read. So you could use [online tools](https://native2ascii.net/).
 
 Everyone should follow the [translation specification](specification.md).
+
+# Actions
+
+We use [git-backup-actions](https://github.com/jenkins-zh/git-backup-actions/) to backup this repo into 
+[gitee](https://gitee.com/jenkins-zh/localization-zh-cn-plugin).

README_zh_CN.md

@@ -19,3 +19,8 @@
 所有的中文字符都需要转为为 ASCII.这样难以阅读，你可以使用这个[在线工具](https://native2ascii.net/)进行快速地转化。
 
 注意，每位贡献者都应该遵循[翻译规范](specification.md)。
+
+# Actions
+
+我们使用 [git-backup-actions](https://github.com/jenkins-zh/git-backup-actions/) 来备份当前仓库到 
+[gitee](https://gitee.com/jenkins-zh/localization-zh-cn-plugin).