Update broken link. (#2721)

Author: Youssef1313

xml/System.IO.Packaging/PackageRelationship.xml

@@ -133,7 +133,7 @@
           <format type="text/markdown"><![CDATA[  
   
 ## Remarks  
- For more information about <xref:System.IO.Packaging.Package> elements see the *Open Packaging Conventions* specification available for download at <https://go.microsoft.com/fwlink/?LinkID=71255>.  
+ For more information about <xref:System.IO.Packaging.Package> elements see the *Open Packaging Conventions* at <https://docs.microsoft.com/en-us/previous-versions/windows/hardware/design/dn614032(v=vs.85)#open-packaging-conventions-and-open-xml-markup-compatibility>.  
   
  ]]></format>
         </remarks>
@@ -333,4 +333,4 @@
       </Docs>
     </Member>
   </Members>
-</Type>
+</Type>