Update index.mdx

Can we add the note style here?

Author: nenizera

src/content/docs/google-tag-gateway/index.mdx

@@ -8,7 +8,11 @@ sidebar:
 
 ## Get started
 
-Google tag gateway for advertisers allows website owners using Cloudflare as a CDN to get the most out of ad measurement tools with just a few clicks. Note: setting this up [directly in Google Tag Manager](https://support.google.com/analytics/answer/16061641) is the fastest way to use this feature.
+Google tag gateway for advertisers allows website owners using Cloudflare as a CDN to get the most out of ad measurement tools with just a few clicks.
+
+:::note
+Setting this up [directly in Google Tag Manager](https://support.google.com/analytics/answer/16061641) is the fastest way to use this feature.
+:::
 
 ### Configure Google tag gateway for advertisers in the dashboard