Add sync-up for floating-point working group (llvm#71885)

Adding a new working group to discuss floating-point issues

Author: Andy Kaylor

llvm/docs/GettingInvolved.rst

@@ -230,6 +230,10 @@ what to add to your calendar invite.
      - Every 2nd Tuesday of the month
      - `gcal <https://calendar.google.com/calendar/u/0?cid=ZDcyMjc0ZjZiZjNhMzFlYmE3NTNkMWM2MGM2NjM5ZWU3ZDE2MjM4MGFlZDc2ZjViY2UyYzMwNzVhZjk4MzQ4ZEBncm91cC5jYWxlbmRhci5nb29nbGUuY29t>`__
      - `Meeting details/agenda <https://docs.google.com/document/d/1Ry8O4-Tm5BFj9AMjr8qTQFU80z-ptiNQ62687NaIvLs/edit?usp=sharing>`__
+   * - Floating Point Working Group
+     - Every 3rd Wednesday of the month
+     - `gcal <https://calendar.google.com/calendar/u/0?cid=MDI1ODI1MDdiYWM3OWQxODY5MDA3MTI1NjZlYzNmYzY5YjMzYWMyNGQ3ZGUwYThjNzZjN2IxOTk3NmYxOTBjMEBncm91cC5jYWxlbmRhci5nb29nbGUuY29t>`__
+     - `Meeting details/agenda: <https://docs.google.com/document/d/1QcmUlWftPlBi-Wz6b6PipqJfvjpJ-OuRMRnN9Dm2t0c>`__
 
 .. _office-hours: