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

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https://hg.mozilla.org/integration/gaia-2_1/rev/3f1531a07baa
Author: Guillaume C. Marty <gmarty@users.noreply.github.com>
Desc: Merge pull request #25399 from gmarty/Bug-1084060-Tapping-on-the-Camera-is-recording-notification-opens-up-the-download-system-update-window-quick-fix

Bug 1084060 - [Window Management] Tapping on the Camera is recording not...

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https://hg.mozilla.org/integration/gaia-2_1/rev/0753177df383
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1084060 - [Window Management] Tapping on the Camera is recording notification, opens up the download system update window
Bumping manifests a=b2g-bump