Update html_sanitizer.rst

Author: OskarStark

html_sanitizer.rst

@@ -798,7 +798,7 @@ URLs of ``<a>`` elements:
 
                     // specifies the allowed URL schemes. If the URL has a different scheme, the
                     // attribute will be dropped
-                    ->allowLinkSchemes(['http', 'https', 'mailto'])
+                    ->allowedLinkSchemes(['http', 'https', 'mailto'])
 
                     // specifies the allowed hosts, the attribute will be dropped if the
                     // URL contains a different host. Subdomains are allowed: e.g. the following