Apply suggestions from code review

Co-authored-by: js6pak <me@6pak.dev>

src/setup-dotnet.ts

@@ -120,15 +120,15 @@ function getVersionFromGlobalJson(globalJsonPath: string): string {
           break;
           
         case 'latestMinor':
-          version = `${major}`;
+          version = `${major}.x`;
           break;
           
         case 'latestFeature':
-          version = `${major}.${minor}`;
+          version = `${major}.${minor}.x`;
           break;
           
         case 'latestPatch':
-          version = `${major}.${minor}.${feature}`
+          version = `${major}.${minor}.${feature}xx`
           break;
       }
     }