Bumping gaia.json for 1 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-1_3/rev/2977b419b73e
Author: gitmai <mri@tid.es>
Desc: Merge pull request #18979 from gitmai/bug-1006348-app-mantain-previous-view

Bug 1006348 -[Cost control] After minimizing the app with the settings s...
Bumping manifests a=b2g-bump