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

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https://hg.mozilla.org/integration/gaia-central/rev/96f2947a5a91
Author: Arnau <arnau@arnaumarch.com>
Desc: Merge pull request #24209 from rnowm/1069531

 Bug 1069531 - [Calendar] Settings: sync and gear icons overlaps r=millermedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/0ba56b8c1b99
Author: rnowm <arnau@arnaumarch.com>
Desc: Bug 1069531 - [Calendar] Settings: sync and gear icons overlaps
Bumping manifests a=b2g-bump