Update protocol.html

Co-authored-by: Ruben Verborgh <ruben@verborgh.org>

protocol.html

@@ -578,7 +578,7 @@ <h3 property="schema:name">Resource Containment</h3>
                   <section id="contained-resource-metadata" inlist="" rel="schema:hasPart" resource="#contained-resource-metadata">
                     <h4 property="schema:name">Contained Resource Metadata</h4>
                     <div datatype="rdf:HTML" property="schema:description">
-                      <p>Container descriptions are not limited to containment triples. To further support client navigation and application interaction, servers can include <a href="#resource-metadata">resource metadata</a> about contained resources as part of the container description.</p>
+                      <p>Container descriptions are not limited to containment triples. To further support client navigation and application interaction, servers can include <a href="#resource-metadata">resource metadata</a> about contained resources as part of the container description, as described below.</p>
 
                       <p><span about="" id="server-contained-resource-metadata" rel="spec:requirement" resource="#server-contained-resource-metadata"><span property="spec:statement"><span rel="spec:requirementSubject" resource="spec:Server">Servers</span> <span rel="spec:requirementLevel" resource="spec:MUST">MUST</span> include <a href="#contained-resource-metadata-statements" rel="rdfs:seeAlso">resource metadata about contained resources</a> as part of the container description, unless that information is inapplicable to the server.</span></span></p>