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

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https://hg.mozilla.org/integration/gaia-central/rev/e433f65f9d08
Author: Tom Herold <tom.herold@scalableminds.com>
Desc: Merge pull request #12735 from hotzenklotz/917445_enhance_image

One click auto enhance for gallery images

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https://hg.mozilla.org/integration/gaia-central/rev/ef5d8b1167ad
Author: Tom Herold <therold@mozilla.com>
Desc: One click auto enhance for gallery images