Bump net.sf.jt400:jt400 from 21.0.5 to 21.0.6

Bumps [net.sf.jt400:jt400](https://github.com/IBM/JTOpen) from 21.0.5 to 21.0.6.
- [Release notes](https://github.com/IBM/JTOpen/releases)
- [Changelog](https://github.com/IBM/JTOpen/blob/main/changes.html)
- [Commits](IBM/JTOpen@v21.0.5...v21.0.6)

---
updated-dependencies:
- dependency-name: net.sf.jt400:jt400
  dependency-version: 21.0.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

pom.xml

@@ -76,7 +76,7 @@
 			<groupId>net.sf.jt400</groupId>
 			<artifactId>jt400</artifactId>
 			<classifier>java11</classifier>
-			<version>21.0.5</version>
+			<version>21.0.6</version>
 		</dependency>
 		<dependency>
 			<groupId>org.jenkins-ci.plugins.workflow</groupId>