Bump msgpack-core from 0.9.3 to 0.9.4 (#542)

Bumps [msgpack-core](https://github.com/msgpack/msgpack-java) from 0.9.3 to 0.9.4.
- [Release notes](https://github.com/msgpack/msgpack-java/releases)
- [Changelog](https://github.com/msgpack/msgpack-java/blob/develop/RELEASE_NOTES.md)
- [Commits](msgpack/msgpack-java@v0.9.3...v0.9.4)

---
updated-dependencies:
- dependency-name: org.msgpack:msgpack-core
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

pom.xml

@@ -117,7 +117,7 @@
         <dependency>
             <groupId>org.msgpack</groupId>
             <artifactId>msgpack-core</artifactId>
-            <version>0.9.3</version>
+            <version>0.9.4</version>
         </dependency>
 
         <!-- Spring Boot -->