feat(docs): danger callout for running render on the browser (#2332)

Author: gabrielmfern

apps/docs/utilities/render.mdx

@@ -84,6 +84,18 @@ This will generate the following output:
 </html>
 ```
 
+<Danger>
+    When running on the browser, to properly support Safari and browsers running on iOS, you will
+    need to polyfill the [ReadableByteStreamController API](https://developer.mozilla.org/en-US/docs/Web/API/ReadableByteStreamController#browser_compatibility).
+
+    We recommend [npm i web-streams-polyfill](https://www.npmjs.com/package/web-streams-polyfill),
+    and it can be applied as follows in some sort of root file for your website:
+
+    ```jsx
+    import "web-streams-polyfill/polyfill";
+    ```
+</Danger>
+
 ## 4. Convert to Plain Text
 
 Plain text versions of emails are important because they ensure that the message can be read by the recipient even if they are unable to view the HTML version of the email.