fix(deps): update kotlin monorepo to v2.3.20 (#1165)

Author: renovate[bot]

gradle/libs.versions.toml

@@ -24,7 +24,7 @@ hilt = "2.59.2"
 hiltNavigationCompose = "1.3.0"
 javaPoet = "1.13.0"
 json = "20250517"
-kotlin = "2.3.10"
+kotlin = "2.3.20"
 ksp = "2.3.6"
 material = "1.13.0"
 mockitoAndroid = "5.23.0"