DEV: Allow webp images to be served directly by nginx (#30050)

This fixes a typo that was introduced in baa5389a23

config/nginx.sample.conf

@@ -196,7 +196,7 @@ server {
           try_files $uri =404;
       }
       # this allows us to bypass rails
-      location ~* \.(gif|png|jpg|jpeg|bmp|tif|tiff|ico||avif)$ {
+      location ~* \.(gif|png|jpg|jpeg|bmp|tif|tiff|ico|webp|avif)$ {
           add_header Access-Control-Allow-Origin *;
           try_files $uri =404;
       }