NIFI-10626 Update jruby-complete to 9.3.8.0

[UcanInfosec]

Summary

NIFI-10626 Update jruby-complete to 9.3.8.0 FROM 9.3.4.0

Tracking

Please complete the following tracking steps prior to pull request creation.

Issue Tracking

• Apache NiFi Jira issue created

Pull Request Tracking

• Pull Request title starts with Apache NiFi Jira issue number, such as NIFI-00000
• Pull Request commit message starts with Apache NiFi Jira issue number, as such NIFI-00000

Pull Request Formatting

• Pull Request based on current revision of the main branch
• Pull Request refers to a feature branch with one commit containing changes

Verification

Please indicate the verification steps performed prior to pull request creation.

Build

• Build completed using mvn clean install -P contrib-check
  • JDK 8
  • JDK 11
  • JDK 17

Licensing

• New dependencies are compatible with the Apache License 2.0 according to the License Policy
• New dependencies are documented in applicable LICENSE and NOTICE files

Documentation

• Documentation formatting appears as expected in rendered files

[UcanInfosec]

Had to run a second workflow on my own branch to have the canceled/unsuccessful check to run. That might need to be the case here

[MikeThomsen]

Next time, please don't forget the Jira ticket # on the commit line.