List of Maintainers outdated on Official Jenkins Plugin Page

### Describe your use-case which is not covered by existing documentation.

The list List of maintainers on [the official Jenkins plugin page](https://plugins.jenkins.io/gitlab-branch-source/) is outdated.

Of the currently listed people there, only @jetersen seems to be an active maintainer:

> - [Parichay Barpanda](https://plugins.jenkins.io/ui/search?query=baymac)
> - [Marky Jackson](https://plugins.jenkins.io/ui/search?query=jequals5)
> - [Justin Harringa](https://plugins.jenkins.io/ui/search?query=justinharringa)
> - [Joseph Petersen](https://plugins.jenkins.io/ui/search?query=jetersen)
> - [Rick](https://plugins.jenkins.io/ui/search?query=surenpi)

Also, [the recently most active contributor](https://github.com/jenkinsci/gitlab-branch-source-plugin/graphs/contributors?from=2022-08-01&to=2023-01-27&type=c) and (probably) actual maintainer, @mifitous , is not listed.

It would be great if the list of maintainers could be updated to boost trust into the maintenance state of this nice plugin.

### Reference any relevant documentation, other materials or issues/pull requests that can be used for inspiration.

https://github.com/jenkinsci/gitlab-branch-source-plugin/pull/273
https://github.com/jenkinsci/gitlab-branch-source-plugin/issues/272