Fix published MSI version 8.9.1 reports version 8.9

Fix notepad-plus-plus#17443

Author: donho

PowerEditor/installer/msi/nppInstall.wxs

@@ -2,7 +2,7 @@
 
 	<Package	Name="Notepad++"
 				Manufacturer="Notepad++ team"
-				Version="8.9"
+				Version="8.9.1"
 				UpgradeCode="{CDB13460-04DF-4708-A7FD-4CB4A0684605}">
 
 		<Media Id="1" Cabinet="product.cab" EmbedCab="yes" />