chore(deps): bump kotestVersion from 5.9.1 to 6.0.3

Bumps `kotestVersion` from 5.9.1 to 6.0.3.

Updates `io.kotest:kotest-runner-junit5-jvm` from 5.9.1 to 6.0.3
- [Release notes](https://github.com/kotest/kotest/releases)
- [Commits](kotest/kotest@v5.9.1...6.0.3)

Updates `io.kotest:kotest-assertions-core-jvm` from 5.9.1 to 6.0.3
- [Release notes](https://github.com/kotest/kotest/releases)
- [Commits](kotest/kotest@v5.9.1...6.0.3)

---
updated-dependencies:
- dependency-name: io.kotest:kotest-runner-junit5-jvm
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
- dependency-name: io.kotest:kotest-assertions-core-jvm
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

build.gradle.kts

@@ -11,7 +11,7 @@ val jacksonVersion = "2.20.0"
 val nettyVersion = "4.2.6.Final"
 val junitJupiterVersion = "5.13.4"
 val freemarkerVersion = "2.3.34"
-val kotestVersion = "5.9.1"
+val kotestVersion = "6.0.3"
 val bouncyCastleVersion = "1.81"
 val springBootVersion = "3.5.5"
 val reactorTestVersion = "3.7.9"