Update URLs on LIVE DOCS

[Adammatthiesen]

This pull request includes updates to the URLs in the SiteTitle.astro file to reflect the new domain for StudioCMS.

URL updates:

• Changed the "Landing" page URL from https://studiocms.xyz to https://studiocms.dev.
• Changed the "Demo" page URL from https://demo.studiocms.xyz to https://next-demo.studiocms.dev.

[changeset-bot]

⚠️ No Changeset found

Latest commit: 617de3b

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[studiocms-no-reply]

Thank you for submitting your Pull Request, the following links will become available for preview shortly:

• StudioCMS Documentation

• StudioCMS Demo (node-playground) (Also deployed with package changes)

• StudioCMS Ui Demo (ui-playground)

[JusticeMatthew]

lgtm

[louisescher]

Again, sorry for multiple approvals, testing Apollo rn