Bump jvm from 2.0.20 to 2.0.21 (#63)

Bumps [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: jvm
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

build.gradle.kts

@@ -9,7 +9,7 @@ val ktfmtVersion = "0.44"
 val javaVersion = JavaVersion.VERSION_21
 
 plugins {
-    kotlin("jvm") version "2.0.20"
+    kotlin("jvm") version "2.0.21"
     id("com.github.ben-manes.versions") version "0.51.0"
     id("com.diffplug.spotless") version "6.25.0"
     `maven-publish`