Correct github remote definition

Change-Id: I520f54011db5c52634b27e3d343bccf3f0364023

default.xml

@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <manifest>
-  <remote  name="anbox" fetch="git@github.com:morphis/" revision="anbox/master" />
+  <remote  name="anbox" fetch="ssh://git@github.com/morphis/" revision="anbox/master" />
 
   <remote  name="aosp"
            revision="refs/tags/android-7.1.1_r13"