Bump net.sf.jt400:jt400 from 20.0.2 to 20.0.3

Bumps [net.sf.jt400:jt400](https://github.com/IBM/JTOpen) from 20.0.2 to 20.0.3.
- [Release notes](https://github.com/IBM/JTOpen/releases)
- [Changelog](https://github.com/IBM/JTOpen/blob/main/changes.html)
- [Commits](IBM/JTOpen@v20.0.2...v20.0.3)

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

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

pom.xml

@@ -38,7 +38,7 @@
  <dependency>
  <groupId>net.sf.jt400</groupId>
  <artifactId>jt400</artifactId>
- <version>20.0.2</version>
+ <version>20.0.3</version>
  </dependency>
  <dependency>
  <groupId>com.googlecode.json-simple</groupId>