Bump maven-assembly-plugin from 3.3.0 to 3.6.0 in /tests/java (#30)

Bumps [maven-assembly-plugin](https://github.com/apache/maven-assembly-plugin) from 3.3.0 to 3.6.0.
- [Commits](apache/maven-assembly-plugin@maven-assembly-plugin-3.3.0...maven-assembly-plugin-3.6.0)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-assembly-plugin
  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]

tests/java/pom.xml

@@ -47,7 +47,7 @@
     <version.lib.commonjava.directory>1.0</version.lib.commonjava.directory>
     <version.plugin.helidon-build-tools>2.0.0-M3</version.plugin.helidon-build-tools>
     <version.plugin.jib>3.3.0</version.plugin.jib>
-    <version.plugin.maven.assembly>3.3.0</version.plugin.maven.assembly>
+    <version.plugin.maven.assembly>3.6.0</version.plugin.maven.assembly>
     <version.plugin.maven.compiler>3.11.0</version.plugin.maven.compiler>
     <version.plugin.maven.dependency>3.6.0</version.plugin.maven.dependency>
     <version.plugin.maven.jar>3.3.0</version.plugin.maven.jar>