Update faq.mdx

Adding a note for ISP-level blocking restrictions (see SPM-2856).

Author: zeinjaber

src/content/docs/waf/troubleshooting/faq.mdx

@@ -52,6 +52,11 @@ If you are the site owner:
 - Monitor blocked requests in your Cloudflare dashboard.
 - Allowlist trusted IPs or fine-tune WAF/bot rules to reduce false positives.
 
+:::note
+
+ISP-level blocks are distinct from Cloudflare or site-owner security restrictions. See [Potential ISP blocking](https://developers.cloudflare.com/support/troubleshooting/general-troubleshooting/potential-isp-blocking/) for details.
+:::
+
 ## Bots
 
 ### How does the WAF handle traffic from known bots?