build: bump kotlinx-coroutines from 1.8.1 to 1.9.0

Bumps `kotlinx-coroutines` from 1.8.1 to 1.9.0.

Updates `org.jetbrains.kotlinx:kotlinx-coroutines-core` from 1.8.1 to 1.9.0
- [Release notes](https://github.com/Kotlin/kotlinx.coroutines/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.coroutines/blob/master/CHANGES.md)
- [Commits](Kotlin/kotlinx.coroutines@1.8.1...1.9.0)

Updates `org.jetbrains.kotlinx:kotlinx-coroutines-test` from 1.8.1 to 1.9.0
- [Release notes](https://github.com/Kotlin/kotlinx.coroutines/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.coroutines/blob/master/CHANGES.md)
- [Commits](Kotlin/kotlinx.coroutines@1.8.1...1.9.0)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlinx:kotlinx-coroutines-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.jetbrains.kotlinx:kotlinx-coroutines-test
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

gradle/libs.versions.toml

@@ -5,7 +5,7 @@ gw2chatlinks = "1.0.0"
 gw2api = "0.5.0"
 junit = "5.10.3"
 kotlin = "2.0.10-RC-510"
-kotlinx-coroutines = "1.8.1"
+kotlinx-coroutines = "1.9.0"
 ktor = "3.0.0-wasm2"