Bumping gaia.json for 4 gaia revision(s) a=gaia-bump

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https://hg.mozilla.org/integration/gaia-central/rev/45e81003a89f
Author: Staś Małolepszy <stas@mozilla.com>
Desc: Merge pull request #28457 from stasm/1136637-allowedHtmlAttrs

Bug 1136637 - Use allowedHtmlAttrs for whitelisting attributes. r=gandalf

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https://hg.mozilla.org/integration/gaia-central/rev/0859368ecfda
Author: Staś Małolepszy <stas@mozilla.com>
Desc: Bug 1136637 - Use allowedHtmlAttrs for whitelisting attributes. r=gandalf

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https://hg.mozilla.org/integration/gaia-central/rev/84f6b8777e1f
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Merge pull request #28339 from Cwiiis/bug988530-notification-toaster-timeout

Bug 988530 - Change the notification toaster timeout to 3.5s. r=mhenretty

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https://hg.mozilla.org/integration/gaia-central/rev/6f574eb9b269
Author: Chris Lord <chrislord.net@gmail.com>
Desc: Bug 988530 - Change the notification toaster timeout to 3.5s. r=mhenretty

b2g/config/gaia.json

@@ -1,9 +1,9 @@
 {
     "git": {
-        "git_revision": "cb3f0c79af8e9875d0bcfde844c67509a019f1bb", 
+        "git_revision": "3affd59f0fe404c599d6246c0857ed365f27cee3", 
         "remote": "https://git.mozilla.org/releases/gaia.git", 
         "branch": ""
     }, 
-    "revision": "c49dc0f84501d190f328b7ee9b3298a560feec72", 
+    "revision": "45e81003a89f26602d1adf7982cec075fdeec7bb", 
     "repo_path": "integration/gaia-central"
 }