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

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https://hg.mozilla.org/integration/gaia-central/rev/24c69552568a
Author: Guillaume C. Marty <gmarty@users.noreply.github.com>
Desc: Merge pull request #26033 from gmarty/Bug-1066243-Battery-indicator-not-always-properly-updating-when-charging-disconnecting

Bug 1066243 - [Status Bar][Battery] Battery indicator not always properl...

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https://hg.mozilla.org/integration/gaia-central/rev/ff53c830f4a6
Author: Guillaume Marty <edo999@gmail.com>
Desc: Bug 1066243 - [Status Bar][Battery] Battery indicator not always properly updating when charging/disconnecting

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "4c5b3b55ef2c39a71bfd04ef111b61284f067724", 
+    "revision": "24c69552568a3d980b3f3f5bb47aaca896646b83", 
     "repo_path": "integration/gaia-central"
 }