Update packages/auth/amplify_auth_cognito_test/test/plugin/fetch_current_device_test.dart

Co-authored-by: Elijah Quartey <Equartey@users.noreply.github.com>

Author: hahnandrew

packages/auth/amplify_auth_cognito_test/test/plugin/fetch_current_device_test.dart

@@ -62,7 +62,7 @@ void main() {
       });
 
       test(
-          'This test should throw a DeviceNotTrackedException when current device key is null',
+          'a DeviceNotTrackedException when current device key is null',
           () async {
         await plugin.forgetDevice();
         await expectLater(