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

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https://hg.mozilla.org/integration/gaia-central/rev/c60c10d1bd4c
Author: John Hu <johu@mozilla.com>
Desc: Merge pull request #11898 from huchengtw-moz/video/Bug_908380_group_videos_in_gallery_view_by_date

Bug 908380 - [Video] - Group videos in gallery view by date, r=djf

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https://hg.mozilla.org/integration/gaia-central/rev/44a0851ef69e
Author: John Hu <johu@mozilla.com>
Desc: Bug 908380 - [Video] - Group videos in gallery view by date