Fix a typo

Signed-off-by: Mario Danic <mario@lovelyhq.com>

app/src/main/java/com/nextcloud/talk/controllers/SettingsController.java

@@ -321,7 +321,7 @@ public class SettingsController extends BaseController {
             }
             settingsCallSounds.setSummary(ringtoneName);
         } else {
-            settingsMessageSound.setSummary(R.string.nc_settings_default_ringtone);
+            settingsCallSounds.setSummary(R.string.nc_settings_default_ringtone);
         }
 
         if (!TextUtils.isEmpty(appPreferences.getMessageRingtoneUri())) {