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

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https://hg.mozilla.org/integration/gaia-central/rev/7f40cbf7faa9
Author: Sam Foster <sam@sam-i-am.com>
Desc: Merge pull request #24072 from sfoster/tutorial-text-height-bug-1065384

Bug 1065384 - Accomodate longer text in FTU tutorial

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https://hg.mozilla.org/integration/gaia-central/rev/6edb0b43e621
Author: Sam Foster <sfoster@mozilla.com>
Desc: Bug 1065384 - Accomodate longer text in FTU tutorial. r=fcampo
Bumping manifests a=b2g-bump