Update HttpCacheAgeControl.xml

Author: gewarren

xml/System.Net.Cache/HttpCacheAgeControl.xml

@@ -42,7 +42,7 @@
     <remarks>
       <format type="text/markdown"><![CDATA[  
   
-## Remarks  
+## RemarksTest
  This enumeration is used by members of the <xref:System.Net.Cache.HttpRequestCachePolicy> class to configure the time values for cache policies.