docs: prefer lowercase html tags

Signed-off-by: Brian Paul <brianp@vmware.com>
diff --git a/docs/repository.html b/docs/repository.html
index 65b1dc2..3e05871 100644
--- a/docs/repository.html
+++ b/docs/repository.html
@@ -92,7 +92,7 @@
 </ol>
 
 
-<H2>Windows Users</H2>
+<h2>Windows Users</h2>
 
 <p>
 If you're <a href="http://git.or.cz/gitwiki/WindowsInstall" target="_parent">
@@ -131,7 +131,7 @@
 mesa3d-dev mailing list.
 </p>
 
-<H2>Developer Git Tips</H2>
+<h2>Developer Git Tips</h2>
 
 <ol>
 <li>Setting up to edit the master branch