Bumping gaia.json for 6 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/9de4a43757d9
Author: Borja Salguero <borjasalguero@users.noreply.github.com>
Desc: Merge pull request #17244 from borjasalguero/update_image_ftu

Bug 984335 - [FTU][Follow up] Update image for FxA using png_recompress....

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https://hg.mozilla.org/integration/gaia-central/rev/69c1f971d1d9
Author: borjasalguero <fbsc@tid.es>
Desc: Bug 984335 - [FTU][Follow up] Update image for FxA using png_recompress.sh r=gsvelto

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https://hg.mozilla.org/integration/gaia-central/rev/8121bc8e78e0
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #17219 from flodolo/bug941600

Bug 941600 - [keyboard] Remove hard-coded character and concatenation in IME switch notification

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https://hg.mozilla.org/integration/gaia-central/rev/637b87682a61
Author: Francesco Lodolo (:flod) <flod@lodolo.net>
Desc: Bug 941600 - [keyboard] Remove hard-coded character and concatenation in IME switch notification

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https://hg.mozilla.org/integration/gaia-central/rev/259549c9531a
Author: Ryan VanderMeulen <rvandermeulen@mozilla.com>
Desc: Merge pull request #17189 from flodolo/bug886738_updatenotification

Bug 886738 - Display full name in Update notification without truncating longer text

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https://hg.mozilla.org/integration/gaia-central/rev/82bb6acc36d5
Author: Francesco Lodolo (:flod) <flod@lodolo.net>
Desc: Bug 886738 - Display full name in Update notification without truncating longer text
Bumping manifests a=b2g-bump