Bump mockk from 1.12.7 to 1.12.8

Bumps [mockk](https://github.com/mockk/mockk) from 1.12.7 to 1.12.8.
- [Release notes](https://github.com/mockk/mockk/releases)
- [Commits](mockk/mockk@1.12.7...v1.12.8)

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

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

Author: dependabot[bot]

build.gradle.kts

@@ -1,6 +1,6 @@
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 
-val mockkVersion = "1.12.7"
+val mockkVersion = "1.12.8"
 val logstashVersion = "7.2"
 val springVersion = "2.5.5"
 val testContainersVersion = "1.17.3"