Update device: Aqara Smart Lock U300 by Aqara (#2301)

Co-authored-by: richardmac64 <120043724+richardmac64@users.noreply.github.com>

Author: github-actions[bot]

custom_components/battery_notes/data/library.json

@@ -6816,6 +6816,12 @@
             "model": "ZSE70",
             "battery_type": "CR123A",
             "battery_quantity": 2
+        },
+        {
+            "manufacturer": "Aqara",
+            "model": "Aqara Smart Lock U300",
+            "battery_type": "AA",
+            "battery_quantity": 4
         }
     ]
 }