chore(deps-dev): bump org.apache.maven:maven-model from 3.8.7 to 3.9.4

Bumps [org.apache.maven:maven-model](https://github.com/apache/maven) from 3.8.7 to 3.9.4.
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.8.7...maven-3.9.4)

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

Signed-off-by: dependabot[bot] <[email protected]>

pom.xml

@@ -73,7 +73,7 @@
 		<maven.version>3.5.0</maven.version>
 		<maven-core.version>3.8.7</maven-core.version>
 		<maven-compat.version>3.8.7</maven-compat.version>
-		<maven-model.version>3.8.7</maven-model.version>
+		<maven-model.version>3.9.4</maven-model.version>
 		<maven-aether-provider.version>3.3.9</maven-aether-provider.version>
 
 		<maven-plugin-plugin.version>3.6.4</maven-plugin-plugin.version>