Update opt in/opt out instructions

Author: pedrosousa

src/content/docs/security/index.mdx

@@ -21,13 +21,19 @@ The application security dashboard is your starting point to better understand t
 
 <Card title="New dashboard experience" icon="rocket">
 
-The new **Security** navigation in the Cloudflare dashboard is currently available for users that opt in to the new user interface. To opt in:
+Cloudflare is gradually making the new **Security** dashboard available by default to users. Users who do not have the new dashboard by default can still manually opt in:
 
 1. Log in to the [Cloudflare dashboard](https://dash.cloudflare.com), and select your account and domain.
 2. Open any page under **Security**.
 3. In the top right-hand corner of the page, select **Try new dashboard**.
 
-You can swap back to the previous dashboard at any time by selecting **Return to old dashboard** in the same page location.
+To opt out of the new security dashboard:
+
+1. Log in to the [Cloudflare dashboard](https://dash.cloudflare.com), and select your account and domain.
+2. Go to **Security** > **Settings**.
+3. Search for the setting **New application security dashboard** and turn it off.
+
+The opt-out option will be available for a limited time.
 
 </Card>