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

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https://hg.mozilla.org/integration/gaia-central/rev/99ecc3f35fb6
Author: Marina <mri@tid.es>
Desc: Merge pull request #25304 from gitmai/bug-1083122-contacts-checkbox-must-be-blue-on-deleting

Bug 1083122 contacts checkbox must be blue on deleting
r=jmcf

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https://hg.mozilla.org/integration/gaia-central/rev/86678f98c2b6
Author: mai <mri@tid.es>
Desc: Bug 1083122 - [Contacts] Check visual consistency of bulk contacts delete screen
Bumping manifests a=b2g-bump