Bump version to v2.12.1

Author: unchihugo

FluentFlyoutMSIX/Package.appxmanifest

@@ -11,7 +11,7 @@
   <Identity
     Name="unchihugo.FluentFlyout"
     Publisher="CN=49793F74-1457-4B66-A672-4ED3A640FC76"
-    Version="2.12.0.0" />
+    Version="2.12.1.0" />
 
   <Properties>
     <DisplayName>FluentFlyout</DisplayName>