Fix typo in index.html

index.html

@@ -613,7 +613,7 @@ Restricting things to scripts that are guaranteed to be satisfiable in a non-mal
 
 <p>
 When analysing Miniscripts for resource limits, restricting yourself to just non-malleable solutions (or even non-malleable scripts) also leads to tighter bounds,
-as all non-canonical satisfactions and dissatisfaction can be left out of consideration.
+as all non-canonical satisfactions and dissatisfactions can be left out of consideration.
 
 </div>
 </div>