Bump kotlinxVersion from 1.8.1 to 1.9.0

Bumps `kotlinxVersion` 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]>

dependencies.gradle

@@ -42,7 +42,7 @@ ext {
 	systemLambdaVersion = '1.2.1'
 	errorproneVersion = '2.31.0'
 	kotlinVersion = '2.0.0'
-	kotlinxVersion = '1.8.1'
+	kotlinxVersion = '1.9.0'
 	kotestVersion = '5.9.1'
 	jspecifyVersion = '1.0.0'
 	moduleName = 'net.jqwik'