Issue on docs: The Calendly link is invalid

[JamieDawson]

There is a broken Calendly link being used on two separate pages:

1. At the bottom of the settings/gitlab.mdx page
2. At the top of the settings/authentication.mdx page

You can also search for 'Calendly' in the repo to find both occurrences.

The link redirects to https://calendly.com/mintlify/demo-your-docs, which no longer works.

[fmerian]

spot on, @JamieDawson! just created a PR to fix it. thanks!