Merge pull request #193 from openapi-processor/dependabot/gradle/kotlin-2.0.21

Bump kotlin from 2.0.20 to 2.0.21

Author: hauner

gradle/libs.versions.toml

@@ -2,7 +2,7 @@
 processor = "2024.7-SNAPSHOT"
 parser = "2024.5-SNAPSHOT"
 
-kotlin = "2.0.20"
+kotlin = "2.0.21"
 build-jdk = "11"
 target-jdk = "11"
 test-jdk = "17"