Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-2_1/rev/211ead0ac56f
Author: Sam Penrose <spenrose@mozilla.com>
Desc: fix unit test after converting MozId to webidl
Fix unit test after converting MozId to webidl r=6a68
Bumping manifests a=b2g-bump