Pin the DisplayName to Windows Terminal to fix the UAC prompt (#4995)

There's an issue in the UAC consent dialog where it cannot read an
application's name if it's stored in a resource. When it fails, it deems
us an "Unknown Program" and that looks pretty silly.

Fixes #2289.

src/cascadia/CascadiaPackage/Package.appxmanifest

@@ -17,7 +17,7 @@
     Version="1.0.0.0" />
 
   <Properties>
-    <DisplayName>ms-resource:AppName</DisplayName>
+    <DisplayName>Windows Terminal</DisplayName>
     <PublisherDisplayName>Microsoft Corporation</PublisherDisplayName>
     <Logo>Images\StoreLogo.png</Logo>
   </Properties>