Update https://developers.cloudflare.com/turnstile/get-started/client… (#26888)

* Update https://developers.cloudflare.com/turnstile/get-started/client-side-rendering/

https://jira.cfdata.org/browse/PCX-20004

* Update src/content/docs/turnstile/get-started/client-side-rendering/index.mdx

---------

Co-authored-by: Patricia Santa Ana <[email protected]>

Author: cjcfcode

src/content/docs/turnstile/get-started/client-side-rendering/index.mdx

@@ -492,6 +492,11 @@ const widgetId = turnstile.render("#container", {
 turnstile.execute("#container");
 ```
 
+---
+## Performance and user experience optimization
+
+Cloudflare recommends that you execute the Turnstile script as early upon the visitor's page entry as possible, so that the verification is complete and the interaction is available once the visitor attempts an action on the page. 
+
 ---
 
 ## Configuration options
@@ -526,4 +531,4 @@ Turnstile is designed to function only on pages using `http://` or `https://` UR
 
 ## Security requirements
 
-<Render file="security-requirements" product="turnstile" />
+<Render file="security-requirements" product="turnstile" />