Update dependency androidx.activity:activity to v1.12.3

Author: renovate[bot]

gradle/libs.versions.toml

@@ -8,7 +8,7 @@ junit = "4.13.2"
 junitVersion = "1.3.0"
 espressoCore = "3.7.0"
 appcompat = "1.7.1"
-activity = "1.12.2"
+activity = "1.12.3"
 activityCompose = "1.12.2"
 room = "2.8.4"
 composeBom = "2026.01.00"