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

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https://hg.mozilla.org/integration/gaia-central/rev/5d722a154b73
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #12507 from lightsofapollo/revert-irc-notifications

Revert "Merge pull request #12482 from lightsofapollo/921297"

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https://hg.mozilla.org/integration/gaia-central/rev/0b60042e5e13
Author: James Lal <james@lightsofapollo.com>
Desc: Revert "Merge pull request #12482 from lightsofapollo/921297"

This reverts commit 97cd1c6e3068130c0dce6fd6d12961695ffccca5, reversing
changes made to 8edfa18285f8c36fd6ed783c4e6db81c4c6e9dd0.