[css4-page] fixing absolute image URL

Author: Daniel Glazman

css4-page/Overview.src.html

@@ -264,8 +264,7 @@ <h2>The CSS 3 Page Model</h2>
       <p>This section is informative.</p>
       <p> </p>
       <figure class="floating-right-image"><img alt="CSS 3 Paged Media's page model"
-          src="file:///Users/glazou/Workspace/csswg/css4-page/PageBox.png"><legend>The
-          CSS3 Page Model</legend></figure>
+          src="PageBox.png"><legend>The CSS3 Page Model</legend></figure>
       The current Page Model, as described in <cite>CSS3 Module: Paged Media </cite>[[!CSS3PAGE]],
       is the following one: the printable area of a page, the <dfn id="page-box">page
         box</dfn>, is made of one page box itself divided in four areas: