MINOR: [Java] Bump com.github.luben:zstd-jni in /java

Bumps [com.github.luben:zstd-jni](https://github.com/luben/zstd-jni) from 1.5.6-5 to 1.5.6-6.
- [Commits](luben/zstd-jni@v1.5.6-5...v1.5.6-6)

---
updated-dependencies:
- dependency-name: com.github.luben:zstd-jni
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <[email protected]>

java/compression/pom.xml

@@ -55,7 +55,7 @@ under the License.
     <dependency>
       <groupId>com.github.luben</groupId>
       <artifactId>zstd-jni</artifactId>
-      <version>1.5.6-5</version>
+      <version>1.5.6-6</version>
     </dependency>
   </dependencies>
 </project>