build(deps): bump kotlinx-serialization from 1.7.1 to 1.7.3

Bumps `kotlinx-serialization` from 1.7.1 to 1.7.3.

Updates `org.jetbrains.kotlinx:kotlinx-serialization-core` from 1.7.1 to 1.7.3
- [Release notes](https://github.com/Kotlin/kotlinx.serialization/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.serialization/blob/master/CHANGELOG.md)
- [Commits](Kotlin/kotlinx.serialization@v1.7.1...v1.7.3)

Updates `org.jetbrains.kotlinx:kotlinx-serialization-json` from 1.7.1 to 1.7.3
- [Release notes](https://github.com/Kotlin/kotlinx.serialization/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.serialization/blob/master/CHANGELOG.md)
- [Commits](Kotlin/kotlinx.serialization@v1.7.1...v1.7.3)

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

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,7 +1,7 @@
 [versions]
 kotlin = "2.0.20"
 kotlinx-coroutines = "1.8.1"
-kotlinx-serialization = "1.7.1"
+kotlinx-serialization = "1.7.3"
 dokka = "1.9.20"
 ktor = "2.3.12"
 openjdk-jmh = "1.37"