update appointment-making URLs from Calendly to MS Bookings

[mirrorstage]

Description

The Help Desk will soon be adopting MS Bookings as a replacement for Calendly. Please coordinate with their leads to identify the new URL to which organizational representatives should navigate.

Proposed solution

A Calendly URL is present in these two libraries:

• frontend/src/app/signUp/IdentityVerification/NextSteps.tsx
• frontend/src/app/signUp/Organization/utils.tsx

Additional context

N/A