Fix passphrase string resource reference

Fixes a stupid mistake in pr #5095 where I changed a string again but
forgot to change the resource reference in code :/

Closes #5140
// FREEBIE

src/org/thoughtcrime/securesms/preferences/AppProtectionPreferenceFragment.java

@@ -138,7 +138,7 @@ public class AppProtectionPreferenceFragment extends PreferenceFragment {
       if (((CheckBoxPreference)preference).isChecked()) {
         AlertDialog.Builder builder = new AlertDialog.Builder(getActivity());
         builder.setTitle(R.string.ApplicationPreferencesActivity_disable_passphrase);
-        builder.setMessage(R.string.ApplicationPreferencesActivity_disable_passphrase_locking_of_signal_and_message_notifications);
+        builder.setMessage(R.string.ApplicationPreferencesActivity_this_will_permanently_unlock_signal_and_message_notifications);
         builder.setIconAttribute(R.attr.dialog_alert_icon);
         builder.setPositiveButton(R.string.ApplicationPreferencesActivity_disable, new DialogInterface.OnClickListener() {
           @Override