doc: update readme

update develop branch

Log:
Change-Id: I7af68ac7d7887e9c6fb6ba81b79beec7a8f7dcd1

README.en.md

@@ -6,7 +6,7 @@ deepin-unioncode is a lightweight integrated development environment, featured w
 
 ## Build dependencies
 
-_The **dev** branch is current development branch, build dependencies may changes without update README.md, refer to `./debian/control` for a working build depends list_
+_The **develop/main** branch is current development branch, build dependencies may changes without update README.md, refer to `./debian/control` for a working build depends list_
 
 -  debhelper (>=9),
 -  cmake,

README.md

@@ -6,7 +6,7 @@ deepin-unioncode 是一款支持多语言、跨平台兼容特性的轻量级集
 
 ## 构建依赖
 
-_当前的开发分支为**dev**，编译依赖可能会在没有更新本说明的情况下发生变化，请参考`./debian/control`以获取构建依赖项列表_
+_当前的开发分支为**develop/main**，编译依赖可能会在没有更新本说明的情况下发生变化，请参考`./debian/control`以获取构建依赖项列表_
 
 -  debhelper (>=9),
 -  cmake,