Add community meeting reference to README

[nscuro]

Description

Adds community meeting reference to README.

Addressed Issue

N/A

Additional Details

N/A

Checklist

• I have read and understand the contributing guidelines
• This PR introduces new or alters existing behavior, and I have updated the documentation accordingly

[owasp-dt-bot]

✅ Snyk checks have passed. No issues have been found so far.

Status	Scan Engine	Critical	High	Medium	Low	Total (0)
✅	Open Source Security	0	0	0	0	0 issues

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[Copilot]

Pull request overview

Adds a “Community” section to the frontend repository README to point contributors/users to the Dependency-Track community meetings, helping readers discover where to get updates and ask questions.

Changes:

• Added a new Community section to README.md.
• Linked to the Dependency-Track community repository’s community meetings information.

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