Add references to community meetings

[nscuro]

No description provided.

[Copilot]

Pull request overview

This PR adds explicit references to Dependency-Track’s monthly community meeting in both the site’s global social links (MkDocs Material) and on the documentation home page, making the meeting easier to discover for readers.

Changes:

• Add a “Monthly community meeting” entry to the MkDocs Material social links.
• Add a “Community” section to the docs landing page with a link to the meeting details.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
mkdocs.yml	Adds a calendar social link pointing to the community meetings section.
docs/index.md	Adds a Community section on the homepage linking to the monthly meeting.

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