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

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https://hg.mozilla.org/integration/gaia-central/rev/30d61ca3165c
Author: Fabien Cazenave <fabien@cazenave.cc>
Desc: Merge pull request #13616 from fabi1cazenave/pin2-bug916059

Bug 916059: fix the PIN2 workflow, r=arthurcc

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https://hg.mozilla.org/integration/gaia-central/rev/c651179e3a3c
Author: Fabien Cazenave <fabien@cazenave.cc>
Desc: Bug 916059: fix the PIN2 workflow, r=arthurcc