Update Kotlin to 2.2.21

Author: nicolaasuni

src/alldev.Dockerfile

@@ -11,7 +11,7 @@ FROM debian:12
 ARG FLYWAY_VERSIONS="11.15.0,10.22.0,7.15.0,9.22.3"
 ARG GO_VERSION="1.25.3"
 ARG HUGO_VERSION="0.152.2"
-ARG KOTLIN_VERSION="2.2.10"
+ARG KOTLIN_VERSION="2.2.21"
 ARG MONGODB_VERSION="8.0"
 ARG NODE_VERSION="22"
 ARG NOMAD_VERSION="1.10.5"

src/gocd-agent-java.Dockerfile

@@ -13,7 +13,7 @@ FROM gocd/gocd-agent-debian-${DEBIAN_VERSION}:${GOCD_VERSION}
 ARG DEBIAN_VERSION
 ARG GOCD_VERSION
 ARG NOMAD_VERSION="1.10.5"
-ARG KOTLIN_VERSION="2.2.10"
+ARG KOTLIN_VERSION="2.2.21"
 ARG VENOM_VERSION="v1.2.0"
 USER root
 ENV DEBIAN_FRONTEND noninteractive

src/gocd-agent.Dockerfile

@@ -15,7 +15,7 @@ ARG GOCD_VERSION
 ARG FLYWAY_VERSIONS="11.15.0,10.22.0,7.15.0,9.22.3"
 ARG GO_VERSION="1.25.3"
 ARG HUGO_VERSION="0.152.2"
-ARG KOTLIN_VERSION="2.2.10"
+ARG KOTLIN_VERSION="2.2.21"
 ARG MONGODB_VERSION="8.0"
 ARG NODE_VERSION="22"
 ARG NOMAD_VERSION="1.10.5"