Fix typo: Link to LDP, not LDN

Author: Peeja

protocol.html

@@ -781,7 +781,7 @@ <h4 property="schema:name">Relationship to LDP</h4>
                     <div datatype="rdf:HTML" property="schema:description">
                       <p><em>This section is non-normative.</em></p>
 
-                      <p>The <a href="https://solidproject.org/TR/protocol" rel="cito:discusses">Solid Protocol</a> and the <a href="https://www.w3.org/TR/ldn/" rel="cito:discusses">Linked Data Platform</a> (<abbr title="Linked Data Platform">LDP</abbr>) [<cite><a class="bibref" href="#bib-ldp">LDP</a></cite>] both use relative referencing of URIs [<cite><a class="bibref" href="#bib-rfc3986">RFC3986</a></cite>].</p>
+                      <p>The <a href="https://solidproject.org/TR/protocol" rel="cito:discusses">Solid Protocol</a> and the <a href="https://www.w3.org/TR/ldp/" rel="cito:discusses">Linked Data Platform</a> (<abbr title="Linked Data Platform">LDP</abbr>) [<cite><a class="bibref" href="#bib-ldp">LDP</a></cite>] both use relative referencing of URIs [<cite><a class="bibref" href="#bib-rfc3986">RFC3986</a></cite>].</p>
 
                       <p>As HTTP clients assign a URI to a resource when using <code>PUT</code> and <code>PATCH</code>, relative references in representation content are deterministic in both the Solid Protocol and LDP.</p>