Bump org.apache.maven:maven-model from 3.8.6 to 3.9.1 in /buildSrc

Bumps [org.apache.maven:maven-model](https://github.com/apache/maven) from 3.8.6 to 3.9.1.
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.8.6...maven-3.9.1)

---
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

@@ -117,7 +117,7 @@ dependencies {
   api 'de.thetaphi:forbiddenapis:3.4'
   api 'com.avast.gradle:gradle-docker-compose-plugin:0.16.11'
   api "org.yaml:snakeyaml:${props.getProperty('snakeyaml')}"
-  api 'org.apache.maven:maven-model:3.8.6'
+  api 'org.apache.maven:maven-model:3.9.1'
   api 'com.networknt:json-schema-validator:1.0.78'
   api "com.fasterxml.jackson.core:jackson-databind:${props.getProperty('jackson_databind')}"