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

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https://hg.mozilla.org/integration/gaia-central/rev/db25ffb7b2e8
Author: Michael Henretty <michael.henretty@gmail.com>
Desc: Revert "Merge pull request #25802 from ADLR-es/highlight-accented"

This reverts commit 1719e9f1385e85ab516fa3f6d2726687a5d16ef5, reversing
changes made to 50be808cea194641ac520ee96b760c5d6bb9bae4.
Bumping manifests a=b2g-bump