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

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https://hg.mozilla.org/integration/gaia-2_1/rev/94c5d002a5c2
Author: Zac <zcampbell@mozilla.com>
Desc: Bug 1073651 - Disable intermittent test_a11y_keyboard_key_names.py a=test-only
Bumping manifests a=b2g-bump