Swift: Improve consistency of phrasing arouaround 'computationally hard'.

Author: geoffw0

swift/ql/src/queries/Security/CWE-328/WeakPasswordHashing.qhelp

@@ -29,7 +29,7 @@
         </ul>
 
         <p>
-            All of MD5, SHA-1, SHA-2 and SHA-3 are weak against offline brute forcing, since they are not computationally hard. This includes SHA-224, SHA-256, SHA-384 and SHA-512, which are in the SHA-2 family.
+            All of MD5, SHA-1, SHA-2 and SHA-3 are weak against offline brute forcing, since they are not sufficiently computationally hard. This includes SHA-224, SHA-256, SHA-384 and SHA-512, which are in the SHA-2 family.
         </p>
 
         <p>
@@ -40,7 +40,7 @@
     <recommendation>
 
         <p>
-            For password storage, you should use a computationally hard cryptographic hash function, such as one of the following:
+            For password storage, you should use a sufficiently computationally hard cryptographic hash function, such as one of the following:
         </p>
 
         <ul>