Change cover.jpg to .webp

Author: strayturtle

layouts/index.html

@@ -3,7 +3,7 @@
     title="{{ .Site.Title }}"
     publisher="{{ .Site.Params.author.name }}"
     publisher-logo-src="{{ index .Site.Params.images 0 }}"
-    poster-portrait-src="{{ "/assets/cover.jpg" }}">
+    poster-portrait-src="{{ "/assets/cover.webp" }}">
 
   {{ partial "pages/cover.html" . }}
   {{ partial "pages/profile.html" . }}