Update compatibility.md

Updated SPFx 1.4.1 to SPFx 1.5 for on prem SharePoint versions

Author: hugoabernier

docs/spfx/compatibility.md

@@ -17,8 +17,8 @@ SharePoint Online always uses the latest version of the SharePoint Framework, bu
 |       SharePoint version               | Supported SPFx version |                                   Supported features                                    |
 | ---------------------------------------| ---------------------- | --------------------------------------------------------------------------------------- |
 | SharePoint Online                      | All versions           | All features                                                                            |
-| SharePoint Server Subscription Edition | v1.4.1 or lower        | SPFx client-side web parts in classic and modern pages, and extensions in modern pages. |
-| SharePoint Server 2019                 | v1.4.1 or lower        | SPFx client-side web parts in classic and modern pages, and extensions in modern pages. |
+| SharePoint Server Subscription Edition | v1.5 or lower        | SPFx client-side web parts in classic and modern pages, and extensions in modern pages. |
+| SharePoint Server 2019                 | v1.5 or lower        | SPFx client-side web parts in classic and modern pages, and extensions in modern pages. |
 | SharePoint 2016 Feature Pack 2         | v1.1                   | SPFx client-side web parts hosted in classic SharePoint pages.                          |
 
 For more information about SharePoint Framework development with SharePoint 2016 Feature Pack 2 and SharePoint 2019, see: