Fix references' link anchor

Author: jorgectf

python/ql/src/experimental/Security/CWE-611/XXE.qlref

@@ -38,7 +38,7 @@ that is not safely configured on untrusted data, and is therefore inherently uns
 <references>
 <li>Python <a href="https://www.edureka.co/blog/python-xml-parser-tutorial/">XML Parsing</a>.</li>
 <li>OWASP vulnerability description: <a href="https://www.owasp.org/index.php/XML_External_Entity_(XXE)_Processing">XML External Entity (XXE) Processing</a>.</li>
-<li>OWASP guidance on parsing xml files: <a href="https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html#java">XXE Prevention Cheat Sheet</a>.</li>
+<li>OWASP guidance on parsing xml files: <a href="https://cheatsheetseries.owasp.org/cheatsheets/XML_External_Entity_Prevention_Cheat_Sheet.html#python">XXE Prevention Cheat Sheet</a>.</li>
 <li>Paper by Timothy Morgen: <a href="https://research.nccgroup.com/2014/05/19/xml-schema-dtd-and-entity-attacks-a-compendium-of-known-techniques/">XML Schema, DTD, and Entity Attacks</a></li>
 <li>Out-of-band data retrieval: Timur Yunusov &amp; Alexey Osipov, Black hat EU 2013: <a href="https://www.slideshare.net/qqlan/bh-ready-v4">XML Out-Of-Band Data Retrieval</a>.</li>
 <li>Denial of service attack (Billion laughs): <a href="https://en.wikipedia.org/wiki/Billion_laughs">Billion Laughs.</a></li>