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

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https://hg.mozilla.org/integration/gaia-2_1/rev/7689e3c1ede2
Author: Ryan VanderMeulen <ryanvm@gmail.com>
Desc: Merge pull request #25516 from TheoChevalier/ice-contacts-hardcoded-2.1

Bug 1089221 - "ICE Contacts" in contacts list is hardcoded

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https://hg.mozilla.org/integration/gaia-2_1/rev/d2e12dae6c30
Author: TheoChevalier <theo.chevalier11@gmail.com>
Desc: Bug 1089221 - "ICE Contacts" in contacts list is hardcoded
Bumping manifests a=b2g-bump