Update Homepage Image Srcset

Fixes large 4K displays not getting 1000px wide image

Author: vkoves

index.html

@@ -18,7 +18,7 @@
 
       <!-- Load 400px image unless we're on a high density (2x) display -->
       <img
-        srcset="images/headshot-bike-400p.webp 1x, images/headshot-bike.webp 2x"
+        srcset="images/headshot-bike-400p.webp 400w, images/headshot-bike.webp 1000w"
         alt="Photo of Viktor Köves on his White Gazelle ebike, riding down Chicago's Lakefront trail
           past a tennis court, wearing shorts, a t-shirt and sunglasses">
     </div>