Bumping gaia.json for 2 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/4830af61b34d
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Merge pull request #25413 from millermedeiros/1083820-months-day-refactor

Bug 1083820 - [Calendar] update MonthsDay view to use DayObserver r=gaye

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https://hg.mozilla.org/integration/gaia-central/rev/ec6797b35645
Author: Miller Medeiros <miller@millermedeiros.com>
Desc: Bug 1083820 - [Calendar] update MonthsDay view to use DayObserver

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "bd416640972b4bd131a97b9faf3380e32cbd98a3", 
+    "revision": "4830af61b34d751c57da15abfc2efcda571b12c0", 
     "repo_path": "/integration/gaia-central"
 }