Bump org.mortbay.jetty:maven-jetty-plugin in /tools/java (#3119)

Bumps org.mortbay.jetty:maven-jetty-plugin from 6.1.10 to 6.1.26.

---
updated-dependencies:
- dependency-name: org.mortbay.jetty:maven-jetty-plugin
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: mandlil <138015259+mandlil@users.noreply.github.com>