chore(deps): Update dependency org.jetbrains.kotlinx:kotlinx-serialization-json to v1.9.0

Author: renovate[bot]

gradle/libs.versions.toml

@@ -17,7 +17,7 @@ adventure-text-serializer-gson = { group = "net.kyori", name = "adventure-text-s
 adventure-text-serializer-legacy = { group = "net.kyori", name = "adventure-text-serializer-legacy", version.ref = "adventure" }
 cache4k = { group = "io.github.reactivecircus.cache4k", name = "cache4k", version = "0.14.0" }
 kotlinx-html = { group = "org.jetbrains.kotlinx", name = "kotlinx-html", version = "0.8.0" }
-kotlinx-serialization-json = { group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-json", version = "1.8.1" }
+kotlinx-serialization-json = { group = "org.jetbrains.kotlinx", name = "kotlinx-serialization-json", version = "1.9.0" }
 ktor-server-core = { group = "io.ktor", name = "ktor-server-core", version.ref = "ktor" }
 ktor-server-netty = { group = "io.ktor", name = "ktor-server-netty", version.ref = "ktor" }
 ktor-client-core = { group = "io.ktor", name = "ktor-client-core", version.ref = "ktor" }