C++: Fix character in qhelp.

Author: geoffw0

cpp/ql/src/Security/CWE/CWE-319/UseOfHttp.qhelp

@@ -28,7 +28,7 @@ OWASP:
 </li>
 <li>
 OWASP Top 10:
-<a href="https://owasp.org/Top10/A08_2021-Software_and_Data_Integrity_Failures/">A08:2021 – Software and Data Integrity Failures</a>.
+<a href="https://owasp.org/Top10/A08_2021-Software_and_Data_Integrity_Failures/">A08:2021 - Software and Data Integrity Failures</a>.
 </li>
 
 </references>