Update windows-autopilot-hybrid.md

Updated the list with Forticlent VPN, could not test but we have a reference - https://deploymentshare.com/using-forticlient-vpn-with-hybrid-aad-logon-after-autopilot-process/

Author: msbemba

memdocs/autopilot/windows-autopilot-hybrid.md

@@ -204,6 +204,7 @@ Here is a list of VPN clients that are known to be tested and validated:
 - Checkpoint (Win32 client)
 - Citrix NetScaler (Win32 client)
 - SonicWall (Win32 client)
+- FortiClient VPN (Win32 client)
 
 **Not supported clients:**
 - UWP-based VPN plug-ins