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

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https://hg.mozilla.org/integration/gaia-1_4/rev/cc9f27ad90ee
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #20792 from crh0716/1022710

Bug 1022710 - Do not update the visibility of the items when the voice type is null r=eragon
Bumping manifests a=b2g-bump