Update powershell/ql/src/queries/security/cwe-502/BinaryFormatterDeserialization.qhelp

Co-authored-by: Mathias Vorreiter Pedersen <mathiasvp@github.com>

Author: chanel-y

powershell/ql/src/queries/security/cwe-502/BinaryFormatterDeserialization.qhelp

@@ -10,7 +10,7 @@ as denial of service or remote code execution.</p>
 </overview>
 <recommendation>
 
-<p>Avoid using BinaryFormatter.</p>
+<p>Avoid using <code>BinaryFormatter</code>.</p>
 
 </recommendation>
 <example>