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

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https://hg.mozilla.org/integration/gaia-central/rev/a28fade83771
Author: Germán Toro del Valle <gtorodelvalle@gmail.com>
Desc: Merge pull request #18993 from gtorodelvalle/calllog-bug-1005805-suggestion-bar-tags-localization

Bug 1005805 - [10n] [Dialer] Phone tags not localized

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https://hg.mozilla.org/integration/gaia-central/rev/f2b868ac294b
Author: German Toro del Valle <gtorodelvalle@gmail.com>
Desc: Bug 1005805 - [10n] [Dialer] Phone tags not localized

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "5228b1619ad1bb9838cc84a30d7fbf2c647bd1ef", 
+    "revision": "a28fade8377146d83bbbb800e066d551c542e233", 
     "repo_path": "/integration/gaia-central"
 }