Bump io.mockk:mockk from 1.13.5 to 1.13.9

Bumps [io.mockk:mockk](https://github.com/mockk/mockk) from 1.13.5 to 1.13.9.
- [Release notes](https://github.com/mockk/mockk/releases)
- [Commits](mockk/mockk@1.13.5...1.13.9)

---
updated-dependencies:
- dependency-name: io.mockk:mockk
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle.kts

@@ -9,7 +9,7 @@ val prometheusVersion = "0.15.0"
 val micrometerVersion = "1.8.4"
 val kotestVersion = "5.6.2"
 val kotestExtensionsVersion = "2.0.0"
-val mockkVersion = "1.13.5"
+val mockkVersion = "1.13.9"
 val slf4jVersion = "1.7.36"
 val logbackVersion = "1.2.13"
 val javaxVersion = "2.1.1"