Modify incorrect link (#2102)

There is no MacOS part in linux.md, now

Author: yunh-kwak

reference/docs-conceptual/setup/Installing-Windows-PowerShell.md

@@ -15,7 +15,7 @@ in their machines, need to:
 1. Get PowerShell for the specific OS and version, from [GitHub](https://github.com/powershell/powershell#get-powershell)
 1. Follow the installation instructions
   - [Linux](https://github.com/PowerShell/PowerShell/blob/master/docs/installation/linux.md)
-  - [macOS](https://github.com/PowerShell/PowerShell/blob/master/docs/installation/linux.md#macos-1012)
+  - [macOS](https://github.com/PowerShell/PowerShell/blob/master/docs/installation/macos.md)
   - [Windows](https://github.com/PowerShell/PowerShell/blob/master/docs/installation/windows.md#msi)
 
 PowerShell 6 is also available for Docker;