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

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https://hg.mozilla.org/integration/gaia-central/rev/0b510489519e
Author: Cristian Rodriguez <crdlc@tid.es>
Desc: Merge pull request #24338 from ADLR-es/bug-ice-confirm-test

Bug 1067234 - [ICE Contacts] Create an integration test for bug 1062595 ...

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https://hg.mozilla.org/integration/gaia-central/rev/52ab584bb1f9
Author: Adrián de la Rosa <hola@adlr.es>
Desc: Bug 1067234 - [ICE Contacts] Create an integration test for bug 1062595 (confirm window when deleting phone numbers)
Bumping manifests a=b2g-bump