Bump maven.version from 3.6.3 to 3.9.6

Bumps `maven.version` from 3.6.3 to 3.9.6.

Updates `org.apache.maven:maven-artifact` 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)

Updates `org.apache.maven:maven-compat` 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)

Updates `org.apache.maven:maven-core` 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)

Updates `org.apache.maven:maven-plugin-api` 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:maven-artifact
  dependency-type: direct:production
  update-type: version-update:semver-minor
- dependency-name: org.apache.maven:maven-compat
  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
- dependency-name: org.apache.maven:maven-plugin-api
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -87,7 +87,7 @@ under the License.
         <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
         <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
 
-        <maven.version>3.6.3</maven.version>
+        <maven.version>3.9.6</maven.version>
         <maven-plugin-plugin.version>3.10.2</maven-plugin-plugin.version>
 
         <scalac-scoverage-plugin.version>2.0.11</scalac-scoverage-plugin.version>