chore: bump maven3.version from 3.6.3 to 3.9.9

Bumps `maven3.version` from 3.6.3 to 3.9.9.

Updates `org.apache.maven:maven-plugin-api` from 3.6.3 to 3.9.9
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.6.3...maven-3.9.9)

Updates `org.apache.maven:maven-core` from 3.6.3 to 3.9.9
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.6.3...maven-3.9.9)

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

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

Author: dependabot[bot]

pom.xml

@@ -43,7 +43,7 @@
     <properties>
         <encoding>UTF-8</encoding>
         <maven.compiler.release>11</maven.compiler.release>
-        <maven3.version>3.6.3</maven3.version>
+        <maven3.version>3.9.9</maven3.version>
         <maven-plugin-annotations.version>3.6.2</maven-plugin-annotations.version>
         <header.basedir>${project.basedir}</header.basedir>
         <junit.version>5.11.4</junit.version>