Bump io.ktor:ktor-client-core from 1.6.8 to 2.3.9

Bumps [io.ktor:ktor-client-core](https://github.com/ktorio/ktor) from 1.6.8 to 2.3.9.
- [Release notes](https://github.com/ktorio/ktor/releases)
- [Changelog](https://github.com/ktorio/ktor/blob/2.3.9/CHANGELOG.md)
- [Commits](ktorio/ktor@1.6.8...2.3.9)

---
updated-dependencies:
- dependency-name: io.ktor:ktor-client-core
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

shared/build.gradle.kts

@@ -19,7 +19,7 @@ kotlin {
   sourceSets {
     val commonMain by getting {
       dependencies {
-        val ktorVersion = captureVersion(implementation("io.ktor:ktor-client-core:1.6.8")!!)
+        val ktorVersion = captureVersion(implementation("io.ktor:ktor-client-core:2.3.9")!!)
         implementation("io.ktor:ktor-client-json:$ktorVersion")
         implementation("io.ktor:ktor-client-serialization:$ktorVersion")