Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/9e047aa77a46
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23059 from KevinGrandon/bug_1055432_calendar_template_literal_kickoff

Bug 1055432 - [Calendar][TemplateLiterals] Make accounts template use Template Literals

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https://hg.mozilla.org/integration/gaia-central/rev/e114e02c84f1
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1055432 - [Calendar][TemplateLiterals] Make accounts template use Template Literals r=millermedeiros

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https://hg.mozilla.org/integration/gaia-central/rev/1d0349d54db4
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Merge pull request #23094 from KevinGrandon/bug_1001090_fake_update_checker_let_fixes

Bug 1001090 - Update let usage in fake update checker

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https://hg.mozilla.org/integration/gaia-central/rev/354c29abc988
Author: Kevin Grandon <kevingrandon@yahoo.com>
Desc: Bug 1001090 - Update let usage in fake update checker r=kgrandon
Bumping manifests a=b2g-bump