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

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https://hg.mozilla.org/integration/gaia-central/rev/824f91896cf5
Author: Min-Zhong "John" Lu <mnjul@users.noreply.github.com>
Desc: Merge pull request #22202 from mnjul/bug_1038502_3_lockscreen_notification_alignment

Bug 1038502 - [VsD Refresh] Lockscreen Visual Refresh > Notifications not to spec > Alignment issue. r=gweng

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https://hg.mozilla.org/integration/gaia-central/rev/9687214e9667
Author: John Lu [:mnjul] <jlu@mozilla.com>
Desc: Bug 1038502 - [VsD Refresh] Lockscreen Visual Refresh > Notifications not to spec > Alignment issue

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "0554691e9aa8b4f9420197cee97fd26a73a560db", 
+    "revision": "824f91896cf53e9a2228ad16caf62fba3b304e38", 
     "repo_path": "/integration/gaia-central"
 }