replay: avoid copy paste mistake without reading docs (#11117)

* replay: avoid copy paste mistake without reading docs

* Update platform-includes/replay/privacy-configuration/javascript.mdx

platform-includes/replay/privacy-configuration/javascript.mdx

@@ -3,6 +3,7 @@ you can opt out of the default text masking and image blocking by configuring th
 
 ```javascript
 Sentry.replayIntegration({
+  // NOTE: This will disable built-in masking. Only use this if your site has no sensitive data, or if you've already set up other options for masking or blocking relevant data, such as 'ignore', 'block', 'mask' and 'maskFn'.
   maskAllText: false,
   blockAllMedia: false,
 });