build(deps): bump net.sf.jt400:jt400 from 20.0.7 to 21.0.0

Bumps [net.sf.jt400:jt400](https://github.com/IBM/JTOpen) from 20.0.7 to 21.0.0.
- [Release notes](https://github.com/IBM/JTOpen/releases)
- [Changelog](https://github.com/IBM/JTOpen/blob/main/changes.html)
- [Commits](IBM/JTOpen@v20.0.7...v21.0.0)

---
updated-dependencies:
- dependency-name: net.sf.jt400:jt400
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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

athena-db2-as400/pom.xml

@@ -31,7 +31,7 @@
         <dependency>
             <groupId>net.sf.jt400</groupId>
             <artifactId>jt400</artifactId>
-            <version>20.0.7</version>
+            <version>21.0.0</version>
         </dependency>
         <!-- https://mvnrepository.com/artifact/software.amazon.awssdk/rds -->
         <dependency>