Bump org.apache.maven.plugins:maven-war-plugin in /java (#3144)

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

---
updated-dependencies:
- dependency-name: org.apache.maven.plugins:maven-war-plugin
  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>

java/demo/pom.xml

@@ -104,7 +104,7 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-war-plugin</artifactId>
-        <version>3.3.1</version>
+        <version>3.4.0</version>
       </plugin>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>