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

Bumps [org.jetbrains.kotlinx:kotlinx-serialization-json](https://github.com/Kotlin/kotlinx.serialization) from 1.8.0 to 1.8.1.
- [Release notes](https://github.com/Kotlin/kotlinx.serialization/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.serialization/blob/master/CHANGELOG.md)
- [Commits](Kotlin/kotlinx.serialization@v1.8.0...v1.8.1)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlinx:kotlinx-serialization-json
  dependency-version: 1.8.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -3,7 +3,7 @@ kotlin = "2.1.10"
 detekt = "1.23.8"
 coroutines = "1.10.2"
 datetime = "0.6.1"
-serialization = "1.8.0"
+serialization = "1.8.1"
 ktor = "3.0.0"
 sqldelight = "2.0.2"
 cloudkit = "0.2.0"