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

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https://hg.mozilla.org/integration/gaia-central/rev/4ef712b02d79
Author: Anthony Ricaud <anthony@ricaud.me>
Desc: Revert "Bug 914886 - [Settings] Use aria-disabled instead of disabled class"

This reverts commit ab7d53c48864e04332df1b1d396457d1d57397dd because it breaks the linter