Bump org.apache.rat:apache-rat-plugin from 0.17 to 0.18 in /lang/java (#3694)

Bumps org.apache.rat:apache-rat-plugin from 0.17 to 0.18.

---
updated-dependencies:
- dependency-name: org.apache.rat:apache-rat-plugin
  dependency-version: '0.18'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

pom.xml

@@ -47,7 +47,7 @@
     <avro.docDir>build/avro-doc-${project.version}/api</avro.docDir>
 
     <!-- plugin versions -->
-    <apache-rat-plugin.version>0.17</apache-rat-plugin.version>
+    <apache-rat-plugin.version>0.18</apache-rat-plugin.version>
     <checkstyle-plugin.version>3.6.0</checkstyle-plugin.version>
     <checkstyle.version>13.3.0</checkstyle.version>
     <enforcer-plugin.version>3.6.2</enforcer-plugin.version>