docs: use id instead of <a name>

Signed-off-by: Brian Paul <brianp@vmware.com>

docs/repository.html

@@ -35,8 +35,7 @@ target="_parent">Mesa demos and tests git repository</a>.
 </p>
 
 
-<a name="anonymous">
-<H2>Anonymous git Access</H2>
+<h2 id="anonymous">Anonymous git Access</h2>
 
 <p>
 To get the Mesa sources anonymously (read-only):
@@ -59,8 +58,7 @@ To get the Mesa sources anonymously (read-only):
 </ol>
 
 
-<a name="developer">
-<H2>Developer git Access</H2>
+<h2 id="developer">Developer git Access</h2>
 
 <p>
 Mesa developers need to first have an account on
@@ -115,8 +113,7 @@ Unix users don't need to set this option.
 <br>
 
 
-<a name="developer">
-<H2>Development Branches</H2>
+<h2>Development Branches</h2>
 
 <p>
 At any given time, there may be several active branches in Mesa's