added reference to the wiki materials

charter/index.html

@@ -173,7 +173,7 @@ <h3>Input Documents</h3>
                     <p>The following documents <i>SHOULD</i> be considered by the Working Group as direct inputs to the specifications to be developed.</p>
 
                     <h5>Existing Project Materials</h5>
-                    <p>In the course of the first charter period of the Dataset Exchange Working Group material was developed which did not get used in the documents published as recommendations and notes, these include various things on the <a href="https://github.com/w3c/dxwg">DXWG Github</a> and the <a href="https://www.w3.org/2017/dxwg/wiki/Main_Page">project wiki</a>, but particularly those issues marked as <a href="https://github.com/w3c/dxwg/issues?q=is%3Aopen+is%3Aissue+label%3Afuture-work">Future-work</a>.</p>
+                    <p>In the course of the first charter period of the Dataset Exchange Working Group material was developed which did not get used in the documents published as recommendations and notes, these include various things on  the <a href="https://github.com/w3c/dxwg">DXWG Github</a> and the <a href="https://www.w3.org/2017/dxwg/wiki/Main_Page">project wiki</a>, but particularly those issues marked as <a href="https://github.com/w3c/dxwg/issues?q=is%3Aopen+is%3Aissue+label%3Afuture-work">Future-work</a>.</p>
 
                     <h5>W3C documents</h5>
                     <ul>