docs: add v1 workflow version badge to all README files

- Add a v1 version badge for the stable workflow to all README files

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

Author: appleboy

README.md

@@ -4,6 +4,7 @@
 
 [GitHub Action](https://github.com/features/actions) for copying files and artifacts via SSH.
 
+[![v1 version](https://github.com/appleboy/scp-action/actions/workflows/stable.yml/badge.svg)](https://github.com/appleboy/scp-action/actions/workflows/stable.yml)
 [![lint and test](https://github.com/appleboy/scp-action/actions/workflows/testing.yml/badge.svg)](https://github.com/appleboy/scp-action/actions/workflows/testing.yml)
 
 > **Note:** Only supports **Linux** [docker](https://www.docker.com/) containers.

README.zh-cn.md

@@ -4,6 +4,7 @@
 
 [GitHub Action](https://github.com/features/actions) 用于通过 SSH 复制文件和构建产物。
 
+[![v1 version](https://github.com/appleboy/scp-action/actions/workflows/stable.yml/badge.svg)](https://github.com/appleboy/scp-action/actions/workflows/stable.yml)
 [![lint and test](https://github.com/appleboy/scp-action/actions/workflows/testing.yml/badge.svg)](https://github.com/appleboy/scp-action/actions/workflows/testing.yml)
 
 > **注意：** 仅支持 **Linux** [docker](https://www.docker.com/) 容器。

README.zh-tw.md

@@ -4,6 +4,7 @@
 
 [GitHub Action](https://github.com/features/actions) 用於透過 SSH 複製檔案與產物。
 
+[![v1 version](https://github.com/appleboy/scp-action/actions/workflows/stable.yml/badge.svg)](https://github.com/appleboy/scp-action/actions/workflows/stable.yml)
 [![lint and test](https://github.com/appleboy/scp-action/actions/workflows/testing.yml/badge.svg)](https://github.com/appleboy/scp-action/actions/workflows/testing.yml)
 
 > **注意：** 只支援 **Linux** [docker](https://www.docker.com/) 容器。