Bump io.mockk:mockk from 1.13.8 to 1.13.9 in /ktor-app (#106)

Bumps [io.mockk:mockk](https://github.com/mockk/mockk) from 1.13.8 to 1.13.9.
- [Release notes](https://github.com/mockk/mockk/releases)
- [Commits](https://github.com/mockk/mockk/commits)

---
updated-dependencies:
- dependency-name: io.mockk:mockk
  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>

ktor-app/build.gradle.kts

@@ -47,7 +47,7 @@ dependencies {
   testImplementation("io.ktor:ktor-server-tests-jvm:$ktor_version")
   testImplementation("org.jetbrains.kotlin:kotlin-test-junit5:$kotlin_version")
 
-  testImplementation("io.mockk:mockk:1.13.8")
+  testImplementation("io.mockk:mockk:1.13.9")
   testImplementation("org.testcontainers:junit-jupiter:1.19.3")
   testImplementation("org.assertj:assertj-core:3.25.0")
 }