Bump com.willowtreeapps.assertk:assertk-jvm from 0.27.0 to 0.28.0

Bumps [com.willowtreeapps.assertk:assertk-jvm](https://github.com/willowtreeapps/assertk) from 0.27.0 to 0.28.0.
- [Release notes](https://github.com/willowtreeapps/assertk/releases)
- [Changelog](https://github.com/willowtreeapps/assertk/blob/main/CHANGELOG.md)
- [Commits](willowtreeapps/assertk@v0.27.0...v0.28.0)

---
updated-dependencies:
- dependency-name: com.willowtreeapps.assertk:assertk-jvm
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

build.gradle.kts

@@ -66,7 +66,7 @@ dependencies {
   testImplementation("org.junit.jupiter:junit-jupiter:$junitVersion")
   testImplementation("org.junit.jupiter:junit-jupiter-params:$junitVersion")
   testImplementation("org.springframework.boot:spring-boot-starter-test")
-  testImplementation("com.willowtreeapps.assertk:assertk-jvm:0.27.0")
+  testImplementation("com.willowtreeapps.assertk:assertk-jvm:0.28.0")
   testImplementation("io.mockk:mockk:1.13.4")
   testImplementation("com.ninja-squad:springmockk:4.0.0")
   testImplementation("org.skyscreamer:jsonassert:1.5.1")