Update src/content/docs/workers/configuration/previews.mdx

Author: caley-b

src/content/docs/workers/configuration/previews.mdx

@@ -130,7 +130,7 @@ To toggle Preview URLs for a Worker:
 1. Log in to the [Cloudflare dashboard](https://dash.cloudflare.com) and select your account.
 2. Go to **Workers & Pages** and in **Overview**, select your Worker.
 3. Go to **Settings** > **Domains & Routes**.
-4. On "Preview URLs" click "Enable" or "Disable".
+4. For Preview URLs, click **Enable** or **Disable**.
 5. Confirm your action.
 
 ### From the [Wrangler configuration file](/workers/wrangler/configuration/)