Move to Unpkg from MaxCDN in Benchmark to fix loading (#301)

Author: bribes

browser-tests/benchmark.html

@@ -21,7 +21,7 @@
 
     <link
       rel="stylesheet"
-      href="https://maxcdn.bootstrapcdn.com/font-awesome/4.3.0/css/font-awesome.min.css"
+      href="https://www.unpkg.com/font-awesome@4.3.0/css/font-awesome.min.css"
     />
 
     <style>