build(deps): bump org.jetbrains.kotlin.jvm from 2.0.20 to 2.0.21

Bumps [org.jetbrains.kotlin.jvm](https://github.com/JetBrains/kotlin) from 2.0.20 to 2.0.21.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/v2.0.21/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.0.20...v2.0.21)

---
updated-dependencies:
- dependency-name: org.jetbrains.kotlin.jvm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

build.gradle

@@ -8,7 +8,7 @@ plugins {
     id 'org.springframework.boot' version '2.7.3'
     id "com.gorylenko.gradle-git-properties" version "2.4.2"
     id "io.freefair.lombok" version "8.10"
-    id 'org.jetbrains.kotlin.jvm' version '2.0.20'
+    id 'org.jetbrains.kotlin.jvm' version '2.0.21'
     id 'org.jetbrains.kotlin.plugin.spring' version '2.0.20'
 }