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

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https://hg.mozilla.org/integration/gaia-central/rev/4f37233ad65c
Author: Jose M. Cantera <jmcanterafonseca@gmail.com>
Desc: Merge pull request #26335 from ADLR-es/highlight-accented

Bug 1088706 - Accented characters like ñ are not highlighted after doing...

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https://hg.mozilla.org/integration/gaia-central/rev/a95c571b0a95
Author: Adrián de la Rosa <hola@adlr.es>
Desc: Bug 1088706 - Accented characters like ñ are not highlighted after doing a search with them

b2g/config/gaia.json

@@ -4,6 +4,6 @@
         "remote": "", 
         "branch": ""
     }, 
-    "revision": "b77cf5f403df2597ae93e414a4d4c8b790f78f55", 
+    "revision": "4f37233ad65c45d0f237d809ca1aad07a54f887a", 
     "repo_path": "integration/gaia-central"
 }