Bump org.apache.maven:apache-maven from 3.6.3 to 3.9.6

Bumps [org.apache.maven:apache-maven](https://github.com/apache/maven) from 3.6.3 to 3.9.6.
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.6.3...maven-3.9.6)

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

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

pom.xml

@@ -83,7 +83,7 @@
   <properties>
     <maven.scm.version>2.0.1</maven.scm.version>
     <mojo.java.target>8</mojo.java.target>
-    <maven.it.version>${mavenVersion}</maven.it.version>
+    <maven.it.version>3.9.6</maven.it.version>
     <takari.plugin.testing.version>3.0.0</takari.plugin.testing.version>
     <takari-lifecycle-plugin.version>2.0.8</takari-lifecycle-plugin.version>
     <test.excludes>**/it/**</test.excludes>