Update browser-rendering.yaml

Author: kathayl

src/content/release-notes/browser-rendering.yaml

@@ -9,6 +9,9 @@ entries:
     title: Page title now included in content endpoint responses
     description: |-
       * The [`/content` endpoint](/browser-rendering/rest-api/content-endpoint/) now returns the page's title, making it easier to identify pages. 
+    title: Default viewport updated to 1920×1080
+    description: |-
+      * The default viewport size has been increased from 800×600 to 1920×1080. You can still override the viewport via request options. 
   - publish_date: "2025-07-25"
     title: "@cloudflare/puppeteer 1.0.4 released"
     description: |-