[cinder] weekly meetings for the remainder of december

As agreed at last week's cinder meeting, our meetings for the remainder of 2021 will be:

* Wednesday, December 22: no meeting * Wednesday, December 29: no meeting

The next weekly cinder meeting will be Wednesday, January 5 at the usual time (1400 UTC) in the usual place (#openstack-meeting-alt on OFTC). The meeting agenda is here: https://etherpad.opendev.org/p/cinder-yoga-meetings

cheers, brian