build(deps): bump ktor from 2.3.8 to 2.3.9

Bumps `ktor` from 2.3.8 to 2.3.9.

Updates `io.ktor:ktor-bom` from 2.3.8 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@2.3.8...2.3.9)

Updates `io.ktor.plugin` from 2.3.8 to 2.3.9

---
updated-dependencies:
- dependency-name: io.ktor:ktor-bom
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.ktor.plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 kotlin = "1.9.22"
-ktor = "2.3.8"
+ktor = "2.3.9"
 hoplite = "2.7.5"
 kondor = "2.2.3"
 confluent = "7.3.3" # FIXME 7.4.0