Add icons at 144x144

For some reason Chromium requires an icon at this size, however the error in Lighthouse states that the size must be *at least* 144x144 but in fact must be exactly this size.

app/controllers/manifests_controller.rb

@@ -37,7 +37,7 @@ class ManifestsController < ApplicationController
   end
 
   def webapp_icons
-    %i[1024 512 384 192 128 96 72 48].map do |size|
+    %i[1024 512 384 192 144 128 96 72 48].map do |size|
       [
         { src: "/icons/icon_x#{size}.webp", sizes: "#{size}x#{size}", type: "image/webp", purpose: "any" },
         { src: "/icons/icon_x#{size}.png", sizes: "#{size}x#{size}", type: "image/png", purpose: "any" },