Bump org.jetbrains.kotlin.jvm from 2.1.20 to 2.1.21

Bumps [org.jetbrains.kotlin.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: org.jetbrains.kotlin.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

@@ -1,5 +1,5 @@
 plugins {
-  id("org.jetbrains.kotlin.jvm") version "2.1.20"
+  id("org.jetbrains.kotlin.jvm") version "2.1.21"
   id("org.jetbrains.kotlin.plugin.allopen") version "2.1.21"
   id("com.google.devtools.ksp") version "2.1.20-1.0.32"
   id("com.github.johnrengelman.shadow") version "8.1.1"