Update 3.0.md

formatting fixed

Author: amrapalijz

versions/3.0.md

@@ -1896,9 +1896,9 @@ responses:
       x-responseProfile: http://www.w3.org/ns/anno.jsonld
       x-responseValueType: 
        - path: a.id
-	 valueType: http://example.org/a.id
+         valueType: http://example.org/a.id
        - path: a.b.c.id
-	 valueType: http://example.org/c.id
+         valueType: http://example.org/c.id
 ```
 
 #### <a name="callbackObject"></a>Callback Object