Bump freemarker from 2.3.29 to 2.3.30
Bump freemarker from 2.3.29 to 2.3.30

Bumps freemarker from 2.3.29 to 2.3.30.

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>
gocd-contrib/docker-elastic-agents,gocd-contrib/docker-elastic-agents,gocd-contrib/docker-elastic-agents