docs(readme): update documentation for GitHub Actions and Docker support

- Update README badges to reflect the new GitHub Actions workflow
- Remove outdated information about Linux Docker container support in README files

Signed-off-by: appleboy <appleboy.tw@gmail.com>

README.md

@@ -7,9 +7,7 @@
 
 ![ssh workflow](./images/ssh-workflow.png)
 
-[![Actions Status](https://github.com/appleboy/ssh-action/workflows/remote%20ssh%20command/badge.svg)](https://github.com/appleboy/ssh-action/actions)
-
-**Important**: Only support **Linux** [docker](https://www.docker.com/) container.
+[![testing main branch](https://github.com/appleboy/ssh-action/actions/workflows/main.yml/badge.svg)](https://github.com/appleboy/ssh-action/actions/workflows/main.yml)
 
 This thing is built using [Golang](https://go.dev) and [drone-ssh](https://github.com/appleboy/drone-ssh). 🚀
 

README.zh-cn.md

@@ -4,9 +4,7 @@
 
 ![ssh workflow](./images/ssh-workflow.png)
 
-[![Actions Status](https://github.com/appleboy/ssh-action/workflows/remote%20ssh%20command/badge.svg)](https://github.com/appleboy/ssh-action/actions)
-
-**注意**： 只支持在 **Linux** [docker](https://www.docker.com/) 容器上执行。
+[![testing main branch](https://github.com/appleboy/ssh-action/actions/workflows/main.yml/badge.svg)](https://github.com/appleboy/ssh-action/actions/workflows/main.yml)
 
 ## 输入变量
 

README.zh-tw.md

@@ -4,9 +4,7 @@
 
 ![ssh workflow](./images/ssh-workflow.png)
 
-[![Actions Status](https://github.com/appleboy/ssh-action/workflows/remote%20ssh%20command/badge.svg)](https://github.com/appleboy/ssh-action/actions)
-
-**注意**： 只支援在 **Linux** [docker](https://www.docker.com/) 容器上執行。
+[![testing main branch](https://github.com/appleboy/ssh-action/actions/workflows/main.yml/badge.svg)](https://github.com/appleboy/ssh-action/actions/workflows/main.yml)
 
 ## 輸入變數