chore: bump org.jetbrains.kotlinx:kotlinx-coroutines-core

Bumps [org.jetbrains.kotlinx:kotlinx-coroutines-core](https://github.com/Kotlin/kotlinx.coroutines) 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
...

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

openfeature/providers/kotlin-provider/gofeatureflag-kotlin-provider/build.gradle.kts

@@ -96,7 +96,7 @@ dependencies {
     api("dev.openfeature:android-sdk:0.3.0")
     api("com.squareup.okhttp3:okhttp:4.12.0")
     api("com.google.code.gson:gson:2.11.0")
-    api("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.8.1")
+    api("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.9.0")
     testImplementation("junit:junit:4.13.2")
     testImplementation("org.jetbrains.kotlinx:kotlinx-coroutines-test:1.8.1")
     testImplementation("com.squareup.okhttp3:mockwebserver:4.12.0")