Bump pf4j from 3.8.0 to 3.9.0 (#360)

Bumps [pf4j](https://github.com/pf4j/pf4j) from 3.8.0 to 3.9.0.
- [Release notes](https://github.com/pf4j/pf4j/releases)
- [Changelog](https://github.com/pf4j/pf4j/blob/master/CHANGELOG.md)
- [Commits](pf4j/pf4j@release-3.8.0...release-3.9.0)

---
updated-dependencies:
- dependency-name: org.pf4j:pf4j
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

pom.xml

@@ -61,7 +61,7 @@
  <usertype-core.version>7.0.0.CR1</usertype-core.version>
  <project.testresult.directory>${project.build.directory}/test-results</project.testresult.directory>
  <pf4j-spring.version>0.8.0</pf4j-spring.version>
- <pf4j.version>3.8.0</pf4j.version>
+ <pf4j.version>3.9.0</pf4j.version>
  <jobrunr.version>4.0.10</jobrunr.version>
  <git.user />
  <git.password />