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

========

https://hg.mozilla.org/integration/gaia-central/rev/22b495e0d2bf
Author: steveck-chung <schung@mozilla.com>
Desc: Merge pull request #23466 from steveck-chung/network-alerts-api-work

Bug 1051795 - [CMAS] Handle the setting that enables/disables CMAS alerts. r=azasypkin

========

https://hg.mozilla.org/integration/gaia-central/rev/5914bd9df928
Author: Steve Chung <schung@mozilla.com>
Desc: Bug 1051795 - [CMAS] Handle the setting that enables/disables CMAS alerts
Bumping manifests a=b2g-bump