Bump io.kotest:kotest-assertions-core from 5.8.1 to 5.9.1

Bumps [io.kotest:kotest-assertions-core](https://github.com/kotest/kotest) from 5.8.1 to 5.9.1.
- [Release notes](https://github.com/kotest/kotest/releases)
- [Commits](kotest/kotest@v5.8.1...v5.9.1)

---
updated-dependencies:
- dependency-name: io.kotest:kotest-assertions-core
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

gradle/libs.versions.toml

@@ -11,4 +11,4 @@ graalvm-buildtools-native = { id = "org.graalvm.buildtools.native", version = "0
 [libraries]
 springdoc-openapi-starter-mvc = { group = "org.springdoc", name = "springdoc-openapi-starter-webmvc-ui", version = "2.5.0" }
 jackson-datatype-jsr310 = { group = "com.fasterxml.jackson.datatype", name="jackson-datatype-jsr310", version = "2.17.1" }
-kostest-assertions = { group = "io.kotest", name = "kotest-assertions-core", version = "5.8.1" }
+kostest-assertions = { group = "io.kotest", name = "kotest-assertions-core", version = "5.9.1" }