fix: typo

index.html

@@ -3243,7 +3243,7 @@ <h2>
                 </p>
                 <p>
                   Unfortunately, even with the <var>redactList</var>, recipient
-                  anonymity is cannot be assured. This is because in some
+                  anonymity cannot be assured. This is because in some
                   countries postal codes are so fine-grained that they can
                   uniquely identify a recipient.
                 </p>