Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_0/rev/f234eb3cf625
Author: Guilherme Goncalves <guilherme.p.gonc@gmail.com>
Desc: Bug 1038881 - Use wakelocks to keep Find My Device alive.
Bumping manifests a=b2g-bump