change strings in notification settings

Signed-off-by: Marcel Hibbe <[email protected]>

app/src/main/res/values/strings.xml

@@ -108,7 +108,7 @@ How to translate with transifex:
     <string name="nc_settings_message_ringtone_key" translatable="false">message_ringtone</string>
     <string name="nc_settings_default_ringtone" translatable="false">Librem by feandesign</string>
     <string name="nc_settings_no_ringtone">No sound</string>
-    <string name="nc_settings_server_notification_app_not_installed_title">Server notification app not installed</string>
+    <string name="nc_settings_server_notification_app_not_installed_title">Server notifications app not installed</string>
     <string name="nc_settings_contact_admin_of">Please contact the administrator of</string>
 
     <string name="nc_settings_appearance">Appearance</string>
@@ -199,7 +199,7 @@ How to translate with transifex:
     <string name="nc_diagnose_gplay_available_yes">Google Play services are available</string>
     <string name="nc_diagnose_gplay_available_no">Google Play services are not available. Notifications are not supported</string>
     <string name="nc_diagnose_battery_optimization_title">Battery settings</string>
-    <string name="nc_diagnose_battery_optimization_not_ignored">Battery optimization is not ignored. This should be changed!</string>
+    <string name="nc_diagnose_battery_optimization_not_ignored">Battery optimization is enabled which might cause issues. You should disable battery optimization!</string>
     <string name="nc_diagnose_battery_optimization_ignored">Battery optimization is ignored, all fine</string>
     <string name="nc_diagnose_notification_permission">Notification permissions</string>
     <string name="nc_diagnose_notification_calls_channel_permission">Calls notification channel enabled?</string>