Bump jvm from 2.1.20 to 2.1.21 (#193)

Bumps [jvm](https://github.com/JetBrains/kotlin) from 2.1.20 to 2.1.21.
- [Release notes](https://github.com/JetBrains/kotlin/releases)
- [Changelog](https://github.com/JetBrains/kotlin/blob/master/ChangeLog.md)
- [Commits](JetBrains/kotlin@v2.1.20...v2.1.21)

---
updated-dependencies:
- dependency-name: jvm
  dependency-version: 2.1.21
  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>

Author: dependabot[bot]

build.gradle.kts

@@ -17,7 +17,7 @@ plugins {
     id("com.github.ben-manes.versions") version "0.52.0"
     id("io.github.gradle-nexus.publish-plugin") version "2.0.0"
     id("org.ajoberstar.grgit") version "5.3.0"
-    kotlin("jvm") version "2.1.20" apply false
+    kotlin("jvm") version "2.1.21" apply false
     idea
 }