fix(web): set canonical as `https://cal.com` in the `<HeadSeo/>`

[p6l-richard]

⚠️ WIP This PR is currently a WIP and mostly for demo purposes

What does this PR do?

This PR handles canonicalization of the web app's pages that are deployed to both app.cal.com & cal.com (see issue).

Fixes #416

Environment: Staging(main branch) / Production

Type of change

• [x] Bug fix (non-breaking change which fixes an issue)
• [ ] Chore (refactoring code, technical debt, workflow improvements)
• [ ] New feature (non-breaking change which adds functionality)
• [ ] Breaking change (fix or feature that would cause existing functionality to not work as expected)
• [ ] This change requires a documentation update

How should this be tested?

• [ ] yarn test-e2e should pass
• [ ] Inspect a couple of pages manually to re-evaluate the canonical tag

Checklist

• I haven't added tests that prove my fix is effective or that my feature works
• I haven't checked if new and existing unit tests pass locally with my changes

[vercel[bot]]

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Name	Status	Preview	Comments	Updated
cal	✅ Ready (Inspect)	Visit Preview	💬 Add your feedback	Jan 30, 2023 at 11:53AM (UTC)
ui	❌ Failed (Inspect)			Jan 30, 2023 at 11:53AM (UTC)

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