Cross-region backups

[atovpeko]

No description provided.

[github-actions]

Allow 10 minutes from last push for the staging site to build. If the link doesn't work, try using incognito mode instead. For internal reviewers, check web-documentation repo actions for staging build status. Link to build for this PR: http://docs-dev.timescale.com/docs-314-docs-rfc-add-docs-for-cross-region-backups

[billy-the-fish]

Nice. Couple of nits.

[billy-the-fish]

Suggested change

	For added reliability, you can enable cross-region backup. In this case, you have two identical backups of your $SERVICE_SHORT at any time, but one of them is in a different AWS region.
	For added reliability, enable cross-region backup. This protects your data when an entire AWS region goes down. Cross-region backups are identical replicas of your $SERVICE_SHORT, but one of them is in a different AWS region. You can have one cross-region backup for a $SERVICE_SHORT.

[atovpeko]

Cross-region backups are identical replicas of your $SERVICE_SHORT, but one of them is in a different AWS region --> this reads like you have multiple cross-region backups per service, which is not the case. Also I wanted to clarify that you don't create cross-region backup once and it stays the same - it gets updated daily and weekly just like the regular backup, so at any point in time you have two identical ones - cross and same-region.