Bump kotest from 6.0.0.M3 to 6.0.0.M4

Bumps `kotest` from 6.0.0.M3 to 6.0.0.M4.

Updates `io.kotest:kotest-assertions-core` from 6.0.0.M3 to 6.0.0.M4
- [Release notes](https://github.com/kotest/kotest/releases)
- [Commits](kotest/kotest@v6.0.0.M3...v6.0.0.M4)

Updates `io.kotest:kotest-framework-engine` from 6.0.0.M3 to 6.0.0.M4
- [Release notes](https://github.com/kotest/kotest/releases)
- [Commits](kotest/kotest@v6.0.0.M3...v6.0.0.M4)

Updates `io.kotest:kotest-runner-junit5` from 6.0.0.M3 to 6.0.0.M4
- [Release notes](https://github.com/kotest/kotest/releases)
- [Commits](kotest/kotest@v6.0.0.M3...v6.0.0.M4)

Updates `io.kotest.multiplatform` from 6.0.0.M3 to 6.0.0.M4

---
updated-dependencies:
- dependency-name: io.kotest:kotest-assertions-core
  dependency-version: 6.0.0.M4
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.kotest:kotest-framework-engine
  dependency-version: 6.0.0.M4
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.kotest:kotest-runner-junit5
  dependency-version: 6.0.0.M4
  dependency-type: direct:production
  update-type: version-update:semver-patch
- dependency-name: io.kotest.multiplatform
  dependency-version: 6.0.0.M4
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -1,6 +1,6 @@
 [versions]
 kotlin = "2.1.20"
-kotest = "6.0.0.M3"
+kotest = "6.0.0.M4"
 detekt = "1.23.8"
 ktlint = "1.1.0"
 okio = "3.11.0"