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

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https://hg.mozilla.org/integration/gaia-central/rev/dc6ae62e62a7
Author: albertopq <albert.pastor@gmail.com>
Desc: Merge pull request #23573 from albertopq/1060118-notification-cutoff

Bug 1060118 - Notifications tray cutoff on landscape r=chrislord

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https://hg.mozilla.org/integration/gaia-central/rev/fe0bad190f39
Author: albertopq <apastor@mozilla.com>
Desc: Bug 1060118 - Notifications tray cutoff on landscape
Bumping manifests a=b2g-bump