docs: Add clarification in Windows build instructions (#21659)

docs/src/development/windows.md

@@ -139,3 +139,5 @@ New-ItemProperty -Path "HKLM:\SYSTEM\CurrentControlSet\Control\FileSystem" -Name
 ```
 
 For more information on this, please see [win32 docs](https://learn.microsoft.com/en-us/windows/win32/fileio/maximum-file-path-limitation?tabs=powershell)
+
+(note that you will need to restart your system after enabling longpath support)