Update device: 99120_021 by Kwikset (#1929)

Co-authored-by: CobraDunn <[email protected]>

Author: github-actions[bot]

custom_components/battery_notes/data/library.json

@@ -5973,6 +5973,12 @@
             "manufacturer": "Zooz",
             "model": "ZSE44",
             "battery_type": "CR2450"
+        },
+        {
+            "manufacturer": "Kwikset",
+            "model": "99120-021",
+            "battery_type": "AA",
+            "battery_quantity": 4
         }
     ]
 }