Bump io.micronaut.maven:micronaut-maven-plugin in /java (#321)

Bumps [io.micronaut.maven:micronaut-maven-plugin](https://github.com/micronaut-projects/micronaut-maven-plugin) from 4.8.2 to 4.9.0.
- [Release notes](https://github.com/micronaut-projects/micronaut-maven-plugin/releases)
- [Commits](micronaut-projects/micronaut-maven-plugin@v4.8.2...v4.9.0)

---
updated-dependencies:
- dependency-name: io.micronaut.maven:micronaut-maven-plugin
  dependency-version: 4.9.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

java/micronaut-server/pom.xml

@@ -120,7 +120,7 @@
     <plugin.resources.version>3.3.1</plugin.resources.version>
     <plugin.jib.version>3.4.4</plugin.jib.version>
     <plugin.compiler.version>3.14.0</plugin.compiler.version>
-    <plugin.micronaut.version>4.8.2</plugin.micronaut.version>
+    <plugin.micronaut.version>4.9.0</plugin.micronaut.version>
 
     <frontend-maven-plugin.version>1.15.1</frontend-maven-plugin.version>
     <node.version>v14.17.6</node.version>