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

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https://hg.mozilla.org/integration/gaia-central/rev/8969cb22a0cf
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Revert "Merge pull request #18406 from cctuan/968661-4"

This reverts commit 6b7a10e5d026cf031b2f3fc0fe5f671ea02dd4f9, reversing
changes made to eb97461e75cd44d20967bc410b5653dff031ef5a.
Bumping manifests a=b2g-bump