Improve block action description

Author: pedrosousa

src/content/docs/ruleset-engine/rules-language/actions.mdx

@@ -92,6 +92,9 @@ The available actions depend on the [phase](/ruleset-engine/about/phases/) where
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         <p>Matching requests are denied access to the site.</p>
+				<p>Depending on the Cloudflare product performing the block action, the HTTP status code can be <a href="/support/troubleshooting/http-status-codes/4xx-client-error/error-403/#cloudflare-specific-information"><code>403</code></a> (most security features) or <a href="/support/troubleshooting/http-status-codes/4xx-client-error/error-429/#website-end-users"><code>429</code></a> (for example, rate limiting rules).</p>
+				<p>Customers on paid plans can customize the HTML error page displayed to website visitors due to the block action. Refer to <a href="/rules/custom-errors/#error-pages">Error Pages</a> for more information.</p>
+				<p>Customers in Pro plans and above can customize the response (HTML, JSON, XML, or plain text) and the response status code for each <a href="/waf/custom-rules/create-dashboard/#configure-a-custom-response-for-blocked-requests">custom rule</a> or <a href="/waf/rate-limiting-rules/create-zone-dashboard/#configure-a-custom-response-for-blocked-requests">rate limiting rule</a> that triggers a block action.</p>
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       <td>Yes</td>
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