Bump org.apache.maven:maven-model from 3.6.2 to 3.9.0 in /buildSrc

Bumps [org.apache.maven:maven-model](https://github.com/apache/maven) from 3.6.2 to 3.9.0.
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.6.2...maven-3.9.0)

---
updated-dependencies:
- dependency-name: org.apache.maven:maven-model
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

buildSrc/build.gradle

@@ -116,7 +116,7 @@ dependencies {
   api 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.7.10'
   api 'de.thetaphi:forbiddenapis:3.3'
   api 'com.avast.gradle:gradle-docker-compose-plugin:0.15.2'
-  api 'org.apache.maven:maven-model:3.6.2'
+  api 'org.apache.maven:maven-model:3.9.0'
   api 'com.networknt:json-schema-validator:1.0.69'
   api "com.fasterxml.jackson.core:jackson-databind:${props.getProperty('jackson_databind')}"