Update plugin org.jetbrains.kotlin.jvm to v2.0.21 (#349)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

build.gradle

@@ -2,7 +2,7 @@ import java.time.ZonedDateTime
 import java.time.format.DateTimeFormatter
 
 plugins {
-  id 'org.jetbrains.kotlin.jvm' version '2.0.20'
+  id 'org.jetbrains.kotlin.jvm' version '2.0.21'
   id 'org.jetbrains.dokka' version '1.9.20' apply false
   id 'org.jlleitschuh.gradle.ktlint' version '12.1.1' apply false
   id 'com.vanniktech.maven.publish' version '0.25.3' apply false