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

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https://hg.mozilla.org/integration/gaia-2_1/rev/62fab5a76e53
Author: Carsten Book <tomcat@mozilla.com>
Desc: Merge pull request #25138 from jmcanterafonseca/fix_v21_comments

Bug 1081748 - [Contacts] Deleting a comment on a contact collapses. r=francisco a=fabrice

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https://hg.mozilla.org/integration/gaia-2_1/rev/0eb74928138a
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Bug 1081748 - [Contacts] Deleting a comment on a contact collapses the whole comment thread on edit screen
Bumping manifests a=b2g-bump