docs: update link to Intel's graphics website

Reviewed-by: Matt Turner <mattst88@gmail.com>

docs/systems.html

@@ -34,8 +34,7 @@ Hardware drivers include:
 </p>
 <ul>
   <li>Intel i965, i945, i915.
-    See <a href="http://intellinuxgraphics.org/index.html">
-      Intel's website</a></li>
+    See <a href="https://01.org/linuxgraphics">Intel's website</a></li>
   <li>AMD Radeon series.
   See <a href="http://www.x.org/wiki/RadeonFeature">RadeonFeature</a></li>
   <li>NVIDIA GPUs.