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

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https://hg.mozilla.org/integration/gaia-central/rev/823d6fd1a645
Author: gitmai <mri@tid.es>
Desc: Merge pull request #20101 from gitmai/bug-973557-button-active-while-updating

Bug 973557 -[CostControl][FTU] Update button active while is updating in...
r=salva

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https://hg.mozilla.org/integration/gaia-central/rev/ee474e2fefe2
Author: mai <mri@tid.es>
Desc: Bug 973557 -[CostControl][FTU] Update button active while is updating information
Bumping manifests a=b2g-bump