Minor doc fix

Author: Seldaek

templates/api_doc/index.html.twig

@@ -449,12 +449,12 @@ GET https://{{ packagist_host }}/statistics.json
 <section class="col-d-12">
     <h3 id="list-security-advisories">{{ 'api_doc.list_security_advisory'|trans }} <span class="badge bg-success">Anonymous</span></h3>
 
-    <p>This endpoint provides a list of security advisories. Either a list of packages as query or request parameter or a timestamp as updatedSince query parameter need to be passed.</p>
+    <p>This endpoint provides a list of security advisories. Either a list of packages as query or request parameter OR a timestamp as updatedSince query parameter needs to be passed.</p>
 
     <p>When querying with a list of packages, known packages will be included in the response with an empty array if they don't have any listed vulnerability. Package names which are not known to have no vulnerability will not be included at all to show that we do not have data on those.</p>
 
     <pre>
-GET https://{{ packagist_host }}/api/security-advisories/?updatedSince=[timestamp]&amp;packages[]=[vendor/package]
+GET https://{{ packagist_host }}/api/security-advisories/?packages[]=[vendor/package]
 <code>
 {
   "advisories": {