Bumping gaia.json for 1 gaia-central revision(s)

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https://hg.mozilla.org/integration/gaia-central/rev/dfacedfab904
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Revert "Bug 883787 - Translate the code in HTML comments in the build process"

This reverts commit 53eea8a3da5ae1de3de471a0b1d48aafdd7e81ce.