docs: fix typo of env demo (#8129)

closed #8125

docs/src/en/guide/essentials/settings.md

@@ -18,7 +18,7 @@ The rules are consistent with [Vite Env Variables and Modes](https://vitejs.dev/
 - Only variables starting with `VITE_` will be embedded into the client-side package. You can access them in the project code like this:
 
   ```ts
-  console.log(import.meta.env.VITE_PROT);
+  console.log(import.meta.env.VITE_PORT);
   ```
 
 - Variables starting with `VITE_GLOB_*` will be added to the `_app-config-{version}-{hash}.js` configuration file during packaging.

docs/src/guide/essentials/settings.md

@@ -18,7 +18,7 @@
 - 只有以 `VITE_` 开头的变量会被嵌入到客户端侧的包中，你可以在项目代码中这样访问它们：
 
   ```ts
-  console.log(import.meta.env.VITE_PROT);
+  console.log(import.meta.env.VITE_PORT);
   ```
 
 - 以 `VITE_GLOB_*` 开头的的变量，在打包的时候，会被加入 `_app-config-{version}-{hash}.js`配置文件当中.