Update copy on 404 page

Author: DrDrij

404.md

@@ -7,7 +7,7 @@ permalink: /404.html
 
 Oops: the lectures have been reorganized and we appear to have broken your link.
 
-<p class="loading">Redirecting you to the homepage</p>
+<p class="loading">Redirecting you to the new address</p>
 
 <br>
 
@@ -16,4 +16,4 @@ Oops: the lectures have been reorganized and we appear to have broken your link.
         //window.location='/'
         window.location='https://python-programming.quantecon.org' + window.location.pathname;
     }, 3000);
-</script>
+</script>