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

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https://hg.mozilla.org/integration/gaia-2_0/rev/c125bcb41edd
Author: Arthur Chen <crh0716@gmail.com>
Desc: Merge pull request #23393 from crh0716/1055874_v2.0

Bug 1055874 - Should not skip the current navigation when there is a pending one r=eragonj

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https://hg.mozilla.org/integration/gaia-2_0/rev/6c68fd60f7c4
Author: Arthur Chen <crh0716@gmail.com>
Desc: Bug 1055874 - Should not skip the current navigation when there is a pending one
Bumping manifests a=b2g-bump