[Rules] Add Page Shield policies to Trace limitations (#24294)

Author: xmflsct

src/content/docs/rules/trace-request/limitations.mdx

@@ -21,3 +21,4 @@ Additionally, the following products will not appear in trace results:
 * [IP Access rules](/waf/tools/ip-access-rules/)
 * [Rate limiting rules (previous version)](/waf/reference/legacy/old-rate-limiting/)
 * [WAF managed rules (previous version)](/waf/reference/legacy/old-waf-managed-rules/)
+* [Page Shield policies](/page-shield/policies/)