Update maven.yml for installing maven

[carryel]

• Added a step for installing maven v3.9.9 by referring to https://github.com/eclipse-ee4j/glassfish/blob/master/.github/workflows/build-windows.yml.

[carryel]

RequireMavenVersion of main branch is [3.8.9,).
Currently, the following error occurs in the PR build environment.

Error: Failed to execute goal org.apache.maven.plugins:maven-enforcer-plugin:3.4.1:enforce (enforce-maven) on project grizzly-project:

Error: Rule 1: org.apache.maven.enforcer.rules.version.RequireMavenVersion failed with message:
Error: Detected Maven Version: 3.8.8 is not in the allowed range [3.8.9,).

Therefore, I modified it so that PR verification is possible by adding a step that can install the latest version of maven.

[pzygielo]

Nice.

The change seems to be introduced to main without review in

• 4.1 for Servlet 6.1 / EE 11 #2209.

I'm happy to see it fixed.