docs: prefer lowercase html tags

Signed-off-by: Brian Paul <brianp@vmware.com>
diff --git a/docs/contents.html b/docs/contents.html
index 08ec977..a255b25 100644
--- a/docs/contents.html
+++ b/docs/contents.html
@@ -27,7 +27,7 @@
 <ul>
 <li><a href="intro.html" target="MainFrame">Introduction</a>
 <li><a href="news.html" target="MainFrame">News</a>
-<LI><A HREF="developers.html" target="MainFrame">Developers</A>
+<li><a href="developers.html" target="MainFrame">Developers</a>
 <li><a href="systems.html" target="MainFrame">Platforms and Drivers</a>
 <li><a href="license.html" target="MainFrame">License &amp; Copyright</a>
 <li><a href="faq.html" target="MainFrame">FAQ</a>
@@ -57,16 +57,16 @@
 <li><a href="egl.html" target="MainFrame">EGL</a>
 <li><a href="opengles.html" target="MainFrame">OpenGL ES</a>
 <li><a href="openvg.html" target="MainFrame">OpenVG / Vega</a>
-<LI><A HREF="envvars.html" target="MainFrame">Environment Variables</A>
-<LI><A HREF="osmesa.html" target="MainFrame">Off-Screen Rendering</A>
-<LI><A HREF="debugging.html" target="MainFrame">Debugging Tips</A>
-<LI><A HREF="perf.html" target="MainFrame">Performance Tips</A>
-<LI><A HREF="extensions.html" target="MainFrame">Mesa Extensions</A>
-<LI><A HREF="mangling.html" target="MainFrame">Function Name Mangling</A>
-<LI><A href="llvmpipe.html" target="MainFrame">Gallium llvmpipe driver</A>
-<LI><A href="vmware-guest.html" target="MainFrame">VMware SVGA3D guest driver</a>
-<LI><A href="postprocess.html" target="MainFrame">Gallium post-processing</A>
-<LI><A href="viewperf.html" target="MainFrame">Viewperf Issues</A>
+<li><a href="envvars.html" target="MainFrame">Environment Variables</a>
+<li><a href="osmesa.html" target="MainFrame">Off-Screen Rendering</a>
+<li><a href="debugging.html" target="MainFrame">Debugging Tips</a>
+<li><a href="perf.html" target="MainFrame">Performance Tips</a>
+<li><a href="extensions.html" target="MainFrame">Mesa Extensions</a>
+<li><a href="mangling.html" target="MainFrame">Function Name Mangling</a>
+<li><a href="llvmpipe.html" target="MainFrame">Gallium llvmpipe driver</a>
+<li><a href="vmware-guest.html" target="MainFrame">VMware SVGA3D guest driver</a>
+<li><a href="postprocess.html" target="MainFrame">Gallium post-processing</a>
+<li><a href="viewperf.html" target="MainFrame">Viewperf Issues</a>
 </ul>
 
 <b>Developer Topics</b>