Bump org.apache.maven.plugins:maven-checkstyle-plugin in /jvm-packages

Bumps [org.apache.maven.plugins:maven-checkstyle-plugin](https://github.com/apache/maven-checkstyle-plugin) from 3.3.1 to 3.4.0.
- [Commits](apache/maven-checkstyle-plugin@maven-checkstyle-plugin-3.3.1...maven-checkstyle-plugin-3.4.0)

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-checkstyle-plugin
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

jvm-packages/pom.xml

@@ -394,7 +394,7 @@
             <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-checkstyle-plugin</artifactId>
-                <version>3.3.1</version>
+                <version>3.4.0</version>
                 <configuration>
                     <configLocation>checkstyle.xml</configLocation>
                     <failOnViolation>true</failOnViolation>