codelab/wiki: fix typo in demo URL

R=r
CC=golang-dev
https://golang.org/cl/1148041

doc/codelab/wiki/index.html

@@ -973,7 +973,7 @@ $ ./8.out
 </pre>
 
 <p>
-Visiting <a href="http://localhost:8080/ANewPage">http://localhost:8080/ANewPage</a>
+Visiting <a href="http://localhost:8080/view/ANewPage">http://localhost:8080/view/ANewPage</a>
 should present you with the page edit form. You should then be able to 
 enter some text, click 'Save', and be redirected to the newly created page.
 </p>

doc/codelab/wiki/wiki.html

@@ -759,7 +759,7 @@ $ ./8.out
 </pre>
 
 <p>
-Visiting <a href="http://localhost:8080/ANewPage">http://localhost:8080/ANewPage</a>
+Visiting <a href="http://localhost:8080/view/ANewPage">http://localhost:8080/view/ANewPage</a>
 should present you with the page edit form. You should then be able to 
 enter some text, click 'Save', and be redirected to the newly created page.
 </p>