[Content] Review and update content on Governance page on mautic.org

[RCheesley]

This task has a Jira ticket at https://mautic.atlassian.net/browse/WR-76, details copied below. Ping us in #hacktoberfest if you need inviting to Jira.

You will find the wireframes for the new website at https://www.figma.com/design/OIqb9D6IT3mOP2HjqlZ230/Mautic.org-website-wireframe?node-id=71-267&t=wmMT8GYs1z5xCZuH-1 which shows the kinds of blocks (far right) and layouts we have available.

You can use just the regular content template but if you'd like to make a mockup on Figma / Canva / Whatever to show the web team how you'd like this page to look (e.g. if you want to use images, layouts etc), please do (and share it with us in the issue comments).

This issue relates to updating the content for Governance, which you can find at https://www.mautic.org/about/governance. If there are any comments from the team they will be found below.

Governance details can be found at https://contribute.mautic.org/governance, ask in #wg-governance if you have any questions. It would be good to create a more detailed page which explains Mautic's governance structures, perhaps using imagery / illustrations to show the structures and how it all ties together.

The link for writing the updated content can be found at https://docs.google.com/document/d/1Z0c_A-FQU1CsGPCoZnaACbfiDjQ0-9YSyzDtd-2dHM8/edit?usp=drivesdk.

Thanks for your help!

Please ask for help in #hacktoberfest if you need any guidance.