chore(deps): update plugin org.jetbrains.kotlin.jvm to v1.8.21

Author: renovate[bot]

build.gradle.kts

@@ -6,7 +6,7 @@ fun properties(key: String) = project.findProperty(key).toString()
 plugins {
     id("java")
     id("jacoco")
-    id("org.jetbrains.kotlin.jvm") version "1.7.10"
+    id("org.jetbrains.kotlin.jvm") version "1.8.21"
     id("org.jetbrains.intellij") version "1.8.0"
     id("org.sonarqube") version "3.4.0.2513"