Update the debug docs

Author: mrmrs

docs/debug-grid/index.html

@@ -32,7 +32,7 @@
       <a href="/" class="dib f5 f4-ns fw6 mt0 mb1 link black-70" title="Home">
         Tachyons
         <div class="dib">
-          <small class="nowrap f6 mt2 mt3-ns pr2 black-70 fw2">v4.7.0</small>
+          <small class="nowrap f6 mt2 mt3-ns pr2 black-70 fw2">v4.8.0</small>
         </div>
       </a>
     </div>
@@ -164,7 +164,7 @@ <h2 class="outline lh-solid f2 f-subheadline-l fw4 mv0">&amp; the Graphic Design
         <h3 class="f5 fw4 pt4 ttu tracked">Grid at 16px</h3>
         <div class="debug-grid-16 pa2 pa4-ns">
           <div class="f5 measure center outline pa4"> 
-            <img class="db w-100 o-30" src="http://mrmrs.io/photos/026.jpg">
+            <img class="db w-100 o-30" src="http://mrmrs.github.io/photos/026.jpg">
             <h1>Image Title</h1>
             <p>Image description</p>
           </div>

docs/debug/index.html

@@ -32,7 +32,7 @@
       <a href="/" class="dib f5 f4-ns fw6 mt0 mb1 link black-70" title="Home">
         Tachyons
         <div class="dib">
-          <small class="nowrap f6 mt2 mt3-ns pr2 black-70 fw2">v4.7.0</small>
+          <small class="nowrap f6 mt2 mt3-ns pr2 black-70 fw2">v4.8.0</small>
         </div>
       </a>
     </div>