Bump maven-jxr-plugin from 2.5 to 3.1.1

Bumps [maven-jxr-plugin](https://github.com/apache/maven-jxr) from 2.5 to 3.1.1.
- [Release notes](https://github.com/apache/maven-jxr/releases)
- [Commits](apache/maven-jxr@jxr-2.5...jxr-3.1.1)

---
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>

pom.xml

@@ -28,7 +28,7 @@
         <jdepend.version>2.0</jdepend.version>
         <javancss.version>2.1</javancss.version>
         <project.info.version>2.9</project.info.version>
-        <jxr.version>2.5</jxr.version>
+        <jxr.version>3.1.1</jxr.version>
         <taglist.version>2.4</taglist.version>
         <m3.site.version>3.6</m3.site.version>
         <changelog.version>2.2</changelog.version>