slightly change postman achievement description (fixes #5645)

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

@@ -504,7 +504,7 @@ Before uploading your changes, the app checks with a <a href=\"https://www.we
     <string name="achievement_wheelchair_title">Mobility</string>
     <string name="achievement_wheelchair_solved_X">You solved %d quests that help wheelchair users get around town!</string>
     <string name="achievement_postman_title">Postman</string>
-    <string name="achievement_postman_solved_X">You helped to locate %d addresses!\nThis data is essential not only for the mail carrier but also for any navigation system.</string>
+    <string name="achievement_postman_solved_X">You helped to locate %d addresses and other postal amenities!\nThis data is essential not only for the mail carrier but also for any navigation system.</string>
     <string name="achievement_building_title">High-Rise</string>
     <string name="achievement_building_solved_X">You solved %d building related quests.\nNote that this app asks for the house number of a building only after its type has been determined.</string>
     <string name="achievement_blind_title">Sixth Sense</string>