Bump org.jetbrains.kotlinx:kotlinx-serialization-json

Bumps [org.jetbrains.kotlinx:kotlinx-serialization-json](https://github.com/Kotlin/kotlinx.serialization) from 1.7.3 to 1.9.0.
- [Release notes](https://github.com/Kotlin/kotlinx.serialization/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.serialization/blob/master/CHANGELOG.md)
- [Commits](Kotlin/kotlinx.serialization@v1.7.3...v1.9.0)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlinx:kotlinx-serialization-json
  dependency-version: 1.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -31,7 +31,7 @@ kotestMockServer = "1.3.0"
 kotlin = "2.1.10"
 kotlinxCoroutines = "1.9.0"
 kotlinxDatetime = "0.6.1"
-kotlinxSerializationJson = "1.7.3"
+kotlinxSerializationJson = "1.9.0"
 ksp = "2.1.10-1.0.31"
 kover = "0.8.3"
 mockk = "1.13.17"