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

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https://hg.mozilla.org/integration/gaia-2_0/rev/f4d7d1012302
Author: EragonJ <eragonj@eragonj.me>
Desc: Merge pull request #20647 from EragonJ/bug-1020867

Bug 1020867 - Don't allow user to turn on wifi hotspot when airplane mod...
Bumping manifests a=b2g-bump