Fix typo

doc/04-schema.md

@@ -380,7 +380,7 @@ specified right down to the class level. This can be useful for libraries with
 only one class in the global namespace. If the php source file is also located
 in the root of the package, for example, it may be declared like this:
 
-    }
+    {
         "autoload": {
             "psr-0": { "UniqueGlobalClass": "" }
         }