remove community from header

[kjaymiller]

• add about.html
• remove community from header
• replace references to community.html

Issue Link 🔗:

Issue: #837

Type of Change

• Bug fix 🐞
• New feature/page
• Documentation update
• Other

Description 📋

• What: Provide an overview of the issue this PR addresses. Explain the context and background information.

Updates the references to community.html to point to the community section of the about page.

• Why: Describe why the changes are being made. Highlight key updates, new features, or bug fixes.

The community.html page was removed.

• How: Explain how these changes will affect the project or end-users.

Should fix the links to pages that don't exist.

Checklist ✅

• Followed the Code of Conduct and Contribution Guide
• Ran pre-commit run --all
• All tests pass locally
• Added tests (if applicable)
• Documentation updated (if applicable)

Additional Notes & Screenshots

Add any additional notes or comments that might be helpful for the reviewers.