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

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https://hg.mozilla.org/integration/gaia-1_4/rev/048b0fb752cb
Author: evelynhung <jj.evelyn@gmail.com>
Desc: Merge pull request #18403 from kaichih/Bug-996549

Bug 996549 - Wifi Hotspot settings SSID network name should NOT accept m...
Bumping manifests a=b2g-bump