Bumping gaia.json for 1 gaia-central revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/fedba450c384
Author: Corey Frang <gnarf37@gmail.com>
Desc: Bug 910168 - When long pressing u key in Spanish keyboard, the first suggested letter is ü, it should be ú - r=rlu

- Switch the order of ü and ú in the alternates