docs: improve documentation and defaults for execution and security

- Clarify that synchronous execution is enabled if multiple hosts are specified
- Specify that sensible defaults are used for allowed cipher algorithms if unspecified
- Clarify that environment variables are passed to the shell script

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

README.md

@@ -22,9 +22,9 @@ See [action.yml](./action.yml) for more detailed information.
 | username                  | SSH username                                                                             |               |
 | password                  | SSH password                                                                             |               |
 | protocol                  | SSH protocol version (tcp, tcp4, tcp6)                                                   | tcp           |
-| sync                      | Enable synchronous execution if multiple hosts                                           | false         |
+| sync                      | Enable synchronous execution if multiple hosts are specified                             | false         |
 | use_insecure_cipher       | Include more ciphers with use_insecure_cipher                                            | false         |
-| cipher                    | Allowed cipher algorithms. If unspecified, a sensible default                            |               |
+| cipher                    | Allowed cipher algorithms. If unspecified, sensible defaults are used                    |               |
 | timeout                   | Timeout duration for SSH to host                                                         | 30s           |
 | command_timeout           | Timeout duration for SSH command                                                         | 10m           |
 | key                       | Content of SSH private key. e.g., raw content of ~/.ssh/id_rsa                           |               |
@@ -44,12 +44,14 @@ See [action.yml](./action.yml) for more detailed information.
 | proxy_use_insecure_cipher | Include more ciphers with use_insecure_cipher for the proxy                              | false         |
 | script                    | Execute commands                                                                         |               |
 | script_path               | Execute commands from a file                                                             |               |
-| envs                      | Pass environment variables to shell script                                               |               |
+| envs                      | Pass environment variables to the shell script                                           |               |
 | envs_format               | Flexible configuration of environment value transfer                                     |               |
 | debug                     | Enable debug mode                                                                        | false         |
 | allenvs                   | Pass the environment variables with prefix value of `GITHUB_` and `INPUT_` to the script | false         |
 | request_pty               | Request a pseudo-terminal from the server                                                | false         |
 
+**Note:** Users can add `set -e` in their shell script to achieve similar functionality to the removed `script_stop` option.
+
 ## Usage
 
 Executing remote SSH commands.

README.zh-cn.md

@@ -50,6 +50,8 @@
 | allenvs                   | 将带有 `GITHUB_` 和 `INPUT_` 前缀的环境变量传递给脚本 | false  |
 | request_pty               | 请求伪终端                                            | false  |
 
+**注意：** 用户可以在他们的 shell 脚本中添加 `set -e` 以实现类似于已删除的 `script_stop` 选项的功能。
+
 ## 使用方法
 
 执行远程 SSH 命令

README.zh-tw.md

@@ -50,6 +50,8 @@
 | allenvs                   | 將帶有 `GITHUB_` 和 `INPUT_` 前綴的環境變數傳遞給腳本 | false  |
 | request_pty               | 從伺服器請求偽終端                                    | false  |
 
+**注意：** 用戶可以在他們的 shell 腳本中添加 `set -e` 以實現類似於已刪除的 `script_stop` 選項的功能。
+
 ## 用法
 
 執行遠端 SSH 命令