[ANNOUNCE] Tree-Closing Window November 15

[Aki Sasaki]

The FirefoxCI taskcluster, community taskcluster, and stage taskcluster CloudSQL databases are scheduled for a reboot on Monday November 15, at 9am PST, for scheduled maintenance [1].

This means we likely want to close trees 2 hours ahead to avoid having lots of tasks running at the time of the reboot; afterwards we can rerun any failed tasks.

If this is a bad time, we can reschedule the window to a better time.

Backchannels:

- matrix / #firefox-ci

- slack / #taskcluster-cloudops

[1] https://cloud.google.com/sql/docs/mysql/maintenance