feat(docs): Fix setup docu (#1926)

* Update settings.mdx

* docs: add cmd

---------

Co-authored-by: Javier Martinez <javiermartinezalvarez98@gmail.com>

fern/docs/pages/manual/settings.mdx

@@ -30,10 +30,15 @@ For example, on **linux and macOS**, this gives:
 export PGPT_PROFILES=my_profile_name_here
 ```
 
-Windows Powershell(s) have a different syntax, one of them being:
+Windows Command Prompt (cmd) has a different syntax:
 ```shell
 set PGPT_PROFILES=my_profile_name_here
 ```
+
+Windows Powershell has a different syntax:
+```shell
+$env:PGPT_PROFILES="my_profile_name_here"
+```
 If the above is not working, you might want to try other ways to set an env variable in your window's terminal.
 
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