Update dependency org.jetbrains.kotlinx:kotlinx-serialization-core to v1.9.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -15,7 +15,7 @@ kotlin = "2.1.21"
 kotlinSerialization = "2.1.21"
 kotlinxCollectionsImmutable = "0.4.0"
 kotlinxCoroutines = "1.10.2"
-kotlinxSerializationCore = "1.8.1"
+kotlinxSerializationCore = "1.9.0"
 ksp = "2.1.21-2.0.2"
 ktlint = "12.3.0"
 lifecycle = "2.9.1"