about screen: update german translation

res/values-de/strings.xml

@@ -106,7 +106,7 @@
     <string name="TODAY">Heute</string>
     <string name="YESTERDAY">Gestern</string>
 
-    <string name="ui_dev_by">UI Entwicklung</string>
+    <string name="ui_dev_by">Entwicklerteam:</string>
     <string name="core_dev_by">Core Entwicklung</string>
     <string name="advanced_settings">Erweiterte Einstellungen</string>
     <string name="change_name_of_profile">&#196;ndere den Namen des Profils</string>