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

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https://hg.mozilla.org/integration/gaia-central/rev/0554691e9aa8
Author: Min-Zhong "John" Lu <mnjul@users.noreply.github.com>
Desc: Merge pull request #22304 from mnjul/bug_1046071_lockscreen_noti_arrow_hidpi

Bug 1046071 - [VsD Refresh] Lockscreen Visual Refresh > Missing HiDPI notifications arrow assets. r=gweng

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https://hg.mozilla.org/integration/gaia-central/rev/96ba88c1cbae
Author: John Lu [:mnjul] <jlu@mozilla.com>
Desc: Bug 1046071 - [VsD Refresh] Lockscreen Visual Refresh > Missing HiDPI notifications arrow assets
Bumping manifests a=b2g-bump