Bumping gaia.json for 1 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/bae1c0012a1b
Author: Mike Pennisi <mike@mikepennisi.com>
Desc: Bug 905260 - [messages] padding issues in the recipient panel r=julienw

Decrease spacing between header and first row of recipients. Address
alignment differences between "unassimilated" (i.e. non-contenteditable)
recipients and "assimilated" recipients.