Change px to w to Hero image

Author: nucliweb

pages/index.mdx

@@ -8,8 +8,8 @@ A curated list of snippets to get Web Performance metrics to use in the browser
   <img
     style={{ aspectRatio: 342 / 214 }}
     sizes="85vw"
-    srcSet="https://res.cloudinary.com/nucliweb/image/upload/c_scale,f_auto,q_auto,w_600/v1685735993/webperf-snippets/DevTools-Snippets.png 600px,
-            https://res.cloudinary.com/nucliweb/image/upload/c_scale,f_auto,q_auto,w_1200/v1685735993/webperf-snippets/DevTools-Snippets.png 1200px"
+    srcSet="https://res.cloudinary.com/nucliweb/image/upload/c_scale,f_auto,q_auto,w_600/v1685735993/webperf-snippets/DevTools-Snippets.png 600w,
+            https://res.cloudinary.com/nucliweb/image/upload/c_scale,f_auto,q_auto,w_1200/v1685735993/webperf-snippets/DevTools-Snippets.png 1200w"
     src="https://res.cloudinary.com/nucliweb/image/upload/c_scale,f_auto,q_auto,w_342/v1685735993/webperf-snippets/DevTools-Snippets.png"
     loading="eager"
     decoding="sync"