build(deps): bump jvm from 2.1.20 to 2.1.21

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
...

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

Author: dependabot[bot]

build.gradle.kts

@@ -2,7 +2,7 @@ import com.palantir.gradle.gitversion.VersionDetails
 import java.util.Date
 
 plugins {
-    kotlin("jvm") version "2.1.20"
+    kotlin("jvm") version "2.1.21"
     id("com.github.johnrengelman.shadow") version "8.1.1"
     id("com.palantir.git-version") version "3.2.0"
     application