Fix multiregion setup

[lvdlee]

The multiregion setup is missing a comma, preventing deployments ran using this file from being accessed through cockroachdb-public.default.
This adds in the extra comma and fixes the issue.

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[cockroach-teamcity]

This change is 

[DuskEagle]

Thanks for the fix!

Reviewed 1 of 1 files at r1.
Reviewable status: complete! 1 of 0 LGTMs obtained

[DuskEagle]

bors r=DuskEagle

[craig]

Build succeeded:

• GitHub CI (Cockroach)