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

========

https://hg.mozilla.org/integration/gaia-central/rev/cf23b263b4bb
Author: James Lal <james@lightsofapollo.com>
Desc: Merge pull request #14247 from lightsofapollo/test-agent-vbump

NO BUG - test-agent vbump r=me

========

https://hg.mozilla.org/integration/gaia-central/rev/b4f1f51113c2
Author: James Lal <james@lightsofapollo.com>
Desc: NO BUG - test-agent vbump r=me