Bump sphinx-maven-plugin from 2.7.0 to 2.9.0 (#3231)
Bump sphinx-maven-plugin from 2.7.0 to 2.9.0 (#3231)

Bumps [sphinx-maven-plugin](https://github.com/trustin/sphinx-maven-plugin) from 2.7.0 to 2.9.0.
- [Release notes](https://github.com/trustin/sphinx-maven-plugin/releases)
- [Commits](https://github.com/trustin/sphinx-maven-plugin/compare/sphinx-maven-plugin-2.7.0...sphinx-maven-plugin-2.9.0)

Signed-off-by: dependabot-preview[bot] <5bdcd3c0d4d24ae3e71b3b452a024c6324c7e4bb@dependabot.com>

Co-authored-by: dependabot-preview[bot] <6a4c1c4838f800d1998274cd5234e1f65c55e90c@users.noreply.github.com>
pkwarren/dropwizard,Alexey1Gavrilov/dropwizard,phambryan/dropwizard,phambryan/dropwizard,micsta/dropwizard,micsta/dropwizard,mosoft521/dropwizard,phambryan/dropwizard,Alexey1Gavrilov/dropwizard,mosoft521/dropwizard,Alexey1Gavrilov/dropwizard,dropwizard/dropwizard,dropwizard/dropwizard,pkwarren/dropwizard,micsta/dropwizard,dropwizard/dropwizard,mosoft521/dropwizard,pkwarren/dropwizard