Bump io.kotest:kotest-assertions-json from 5.9.1 to 6.0.3

Bumps [io.kotest:kotest-assertions-json](https://github.com/kotest/kotest) 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-assertions-json
  dependency-version: 6.0.3
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

Author: dependabot[bot]

gradle/libs.versions.toml

@@ -16,7 +16,7 @@ logging = "7.0.7"
 jreleaser = "1.19.0"
 binaryCompatibilityValidatorPlugin = "0.18.1"
 slf4j = "2.0.17"
-kotest = "5.9.1"
+kotest = "6.0.3"
 
 # Samples
 mcp-kotlin = "0.6.0"