Update http_foundation.rst

Author: gergelypap

components/http_foundation.rst

@@ -668,4 +668,4 @@ Learn More
 .. _nginx: https://www.nginx.com/resources/wiki/start/topics/examples/xsendfile/
 .. _Apache: https://tn123.org/mod_xsendfile/
 .. _`JSON Hijacking`: http://haacked.com/archive/2009/06/25/json-hijacking.aspx
-.. _OWASP guidelines: https://www.owasp.org/index.php/OWASP_AJAX_Security_Guidelines#Always_return_JSON_with_an_Object_on_the_outside
+.. _OWASP guidelines: https://cheatsheetseries.owasp.org/cheatsheets/AJAX_Security_Cheat_Sheet.html#always-return-json-with-an-object-on-the-outside