chore(deps-dev): bump com.willowtreeapps.assertk:assertk-jvm

Bumps [com.willowtreeapps.assertk:assertk-jvm](https://github.com/willowtreeapps/assertk) from 0.27.0 to 0.28.1.
- [Release notes](https://github.com/willowtreeapps/assertk/releases)
- [Changelog](https://github.com/willowtreeapps/assertk/blob/main/CHANGELOG.md)
- [Commits](willowtreeapps/assertk@v0.27.0...v0.28.1)

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

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

client-kotlin/pom.xml

@@ -211,7 +211,7 @@
  <dependency>
  <groupId>com.willowtreeapps.assertk</groupId>
  <artifactId>assertk-jvm</artifactId>
- <version>0.27.0</version>
+ <version>0.28.1</version>
  <scope>test</scope>
  <exclusions>
  <exclusion>