Bump maven-jxr-plugin from 2.4 to 3.3.0

Bumps [maven-jxr-plugin](https://github.com/apache/maven-jxr) from 2.4 to 3.3.0.
- [Release notes](https://github.com/apache/maven-jxr/releases)
- [Commits](https://github.com/apache/maven-jxr/compare/jxr-2.4...jxr-3.3.0)

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

Signed-off-by: dependabot[bot] <support@github.com>
diff --git a/pom.xml b/pom.xml
index b39833f..697c78c 100644
--- a/pom.xml
+++ b/pom.xml
@@ -256,7 +256,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-jxr-plugin</artifactId>
-        <version>2.4</version>
+        <version>3.3.0</version>
         <configuration>
           <aggregate>true</aggregate>
           <linkJavadoc>true</linkJavadoc>