Fix members links

[joanagmaia]

Changes proposed ✍️

What

🤖 Generated by Copilot at 74e0bf1

This pull request updates the links to member profiles in various places to point to the new contacts page. This is part of the frontend refactor that renames members to contacts throughout the app.
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🤖 Generated by Copilot at 74e0bf1

members to contacts
frontend refactor complete
autumn leaves fall fast

Why

How

🤖 Generated by Copilot at 74e0bf1

• Update links to member profiles in Slack messages and quickstart guide to point to contacts page instead of members page (link, link, link, link)

Checklist ✅

• Label appropriately with Feature, Improvement, or Bug.
• Add screehshots to the PR description for relevant FE changes
• New backend functionality has been unit-tested.
• API documentation has been updated (if necessary) (see docs on API documentation).
• Quality standards are met.