Bump org.jetbrains.kotlinx:kotlinx-coroutines-jdk8 in /lib/kotlin (#2798)

Bumps [org.jetbrains.kotlinx:kotlinx-coroutines-jdk8](https://github.com/Kotlin/kotlinx.coroutines) from 1.6.1 to 1.6.4.
- [Release notes](https://github.com/Kotlin/kotlinx.coroutines/releases)
- [Changelog](https://github.com/Kotlin/kotlinx.coroutines/blob/master/CHANGES.md)
- [Commits](https://github.com/Kotlin/kotlinx.coroutines/compare/1.6.1...1.6.4)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlinx:kotlinx-coroutines-jdk8
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
diff --git a/lib/kotlin/build.gradle.kts b/lib/kotlin/build.gradle.kts
index 06b73f2..3263586 100644
--- a/lib/kotlin/build.gradle.kts
+++ b/lib/kotlin/build.gradle.kts
@@ -29,7 +29,7 @@
 dependencies {
     implementation(platform("org.jetbrains.kotlin:kotlin-bom"))
     implementation("org.jetbrains.kotlin:kotlin-stdlib-jdk8")
-    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:1.6.1")
+    implementation("org.jetbrains.kotlinx:kotlinx-coroutines-jdk8:1.6.4")
     implementation("org.apache.thrift:libthrift:INCLUDED")
     testImplementation(kotlin("test"))
 }