Update o1p01-clear-purpose.html

fixed  tag issue

Author: RashmiKatakwar

design-guide/o1p01-clear-purpose.html

@@ -54,7 +54,8 @@ How it Helps
   p>
   <p>
     For this pattern to be useful, each page must have a clear purpose. It works best when each page covers
-    a single unifying topic. (See <a>4.3.2a>4.3.2 for more details.)
+    a single unifying topic. (See pattern <a href="#make-the-site-hierarchy-easy-to-understand-and-navigate-pattern">
+      4.3.2 Make the Site Hierarchy Easy to Understand and Navigate a> for more details.)
   p>
 section>
 <section>