Bump version.maven from 3.8.2 to 3.8.8

Bumps `version.maven` from 3.8.2 to 3.8.8.

Updates `org.apache.maven:maven-core` from 3.8.2 to 3.8.8
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.8.2...maven-3.8.8)

Updates `org.apache.maven:maven-plugin-api` from 3.8.2 to 3.8.8
- [Release notes](https://github.com/apache/maven/releases)
- [Commits](apache/maven@maven-3.8.2...maven-3.8.8)

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

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

build/configuration/pom.xml

@@ -232,7 +232,7 @@
 
       <!-- Plugin dependencies -->
       <version.checkstyle.maven-plugin>3.3.0</version.checkstyle.maven-plugin>
-      <version.maven>3.8.2</version.maven>
+      <version.maven>3.8.8</version.maven>
       <version.maven.antlr3>3.5.2</version.maven.antlr3>
       <version.maven.antrun>3.1.0</version.maven.antrun>
       <version.maven.buildhelper>3.4.0</version.maven.buildhelper>