Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/3a7a6224c146
Author: Gareth Aye <gaye@mozilla.com>
Desc: Merge pull request #23386 from millermedeiros/1057023-month-view-dots-2.0

Bug 1057023 - [Calendar] Event Icons are not changed in months other than the selected one when enabling/disabling calendars r=gaye

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https://hg.mozilla.org/integration/gaia-2_0/rev/fbc69b2ec517
Author: Miller Medeiros <miller@millermedeiros.com>
Desc:  Bug 1057023 - [Calendar] Event Icons are not changed in months other than the selected one when enabling/disabling calendars
Bumping manifests a=b2g-bump