docs: pull request branch in EN and CN introduce docs (#6404)

Author: HeyXml

.github/PULL_REQUEST_TEMPLATE/pr_cn.md

@@ -1,6 +1,6 @@
 首先，感谢你的贡献！ 😄
 
-新特性请提交至 feature 分支，其余可提交至 master 分支。在一个维护者审核通过后合并。请确保填写以下 pull request 的信息，谢谢！~
+新特性请提交至 feature 分支，其余可提交至 main 分支。在一个维护者审核通过后合并。请确保填写以下 pull request 的信息，谢谢！~
 
 [[English Template / 英文模板](./pr_en.md)]
 

.github/PULL_REQUEST_TEMPLATE/pr_en.md

@@ -1,6 +1,6 @@
 First of all, thank you for your contribution! 😄
 
-New feature please send pull request to feature branch, and rest to master branch. Pull request will be merged after one of collaborators approve. Please makes sure that these form are filled before submitting your pull request, thank you!
+New feature please send pull request to feature branch, and rest to main branch. Pull request will be merged after one of collaborators approve. Please makes sure that these form are filled before submitting your pull request, thank you!
 
 [[中文版模板 / Chinese template](./pr_cn.md)]