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

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https://hg.mozilla.org/integration/gaia-central/rev/4dbd4764b19d
Author: EragonJ (E.J.) <eragonj@eragonj.me>
Desc: Merge pull request #26325 from EragonJ/bug-1100689

Bug 1100689 - [Flatfish][Setting] Box overflow at volume options

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https://hg.mozilla.org/integration/gaia-central/rev/723b8bb9bb0b
Author: EragonJ <eragonj@eragonj.me>
Desc: Bug 1100689 - [Flatfish][Setting] Box overflow at volume options
Bumping manifests a=b2g-bump