docs(git): add advanced and error

docs/platform/[GitLab]受保护分支.md

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+
+# [GitLab]受保护分支
+
+强制上传代码到`Gitlab`仓库的`dev`分支出错，提示如下：
+
+```
+GitLab: You are not allowed to force push code to a protected branch on this project
+```
+
+参考：[解决 GitLab: You are not allowed to force push code to a protected branch on this project问题](https://blog.csdn.net/mqdxiaoxiao/article/details/95794053)
+
+是由于分支保护的原因，需要进入仓库`setting -> Repository -> Protected Branches`
+
+![](./imgs/protected-branches.png)
+
+允许`dev`分支能够强制推送