fix(docs): 修改用 docker-compose 更新 rsshub 的文案，对新手更友好 (#7192)

* Update README.md in install

在 docker-compose 更新操作的指示中加入拉取新镜像的操作提示，对新手更友好。否则新手直接 docker-compose up -d 可能导致没有更新镜像。

* Update README.md in install

更新遗漏的 $ 符号

* Update README.md

修改了对应英文文档

* Update README.md

* Update README.md

* Update README.md

* Update docs/install/README.md

Co-authored-by: NeverBehave <gayhub@never.pet>

* Update docs/en/install/README.md

Co-authored-by: NeverBehave <gayhub@never.pet>

Co-authored-by: NeverBehave <gayhub@never.pet>

docs/en/install/README.md

@@ -51,6 +51,12 @@ Remove old containers
 $ docker-compose down
 ```
 
+Repull the latest image if you have downloaded the image before. It is helpful to resolve some issues.
+
+```bash
+$ docker pull diygod/rsshub
+```
+
 Then repeat the installation steps
 
 ### Configuration
@@ -532,4 +538,3 @@ See docs of specified route and `lib/config.js` for detail information.
         | https://pic1.xuehuaimg.com/proxy/        | cloudflare   |
         | https://cors.netnr.workers.dev/          | cloudflare   |
         | https://netnr-proxy.openode.io/          | digitalocean |
-

docs/install/README.md

@@ -51,6 +51,12 @@ $ docker-compose up -d
 $ docker-compose down
 ```
 
+如果之前已经下载/使用过镜像，下方命令可以帮助你获取最新版本：这可能可以解决一些问题。
+
+```bash
+$ docker pull diygod/rsshub
+```
+
 然后重复安装步骤
 
 ### 添加配置