spelling: necessitates

Signed-off-by: Josh Soref <[email protected]>

Author: jsoref

python/ql/src/experimental/Security/CWE-091/Xslt.qhelp

@@ -8,7 +8,7 @@
     <recommendation>
         <p>
             This vulnerability can be prevented by not allowing untrusted user input to be passed as an XSL stylesheet.
-            If the application logic necessiates processing untrusted XSL stylesheets, the input should be properly filtered and sanitized before use.
+            If the application logic necessitates processing untrusted XSL stylesheets, the input should be properly filtered and sanitized before use.
         </p>
     </recommendation>
     <example>