Use more general appendix title

Author: selfissued

openid-federation-1_0.xml

@@ -10285,7 +10285,7 @@ HTTP/1.1 302 Found
 
     </references>
 
-    <section anchor="ChainBuildingExample" title="Example OpenID Provider Information Discovery and Client Registration">
+    <section anchor="FederationExamples" title="Examples Building and Using Trust Chains">
       <t>
         Let us assume the following: The project LIGO would like to offer access
         to its wiki to all OPs in eduGAIN. LIGO is registered with the InCommon