chore: improve sponsors layout on mobile

Author: iiio2

app/pages/about.vue

@@ -164,7 +164,7 @@ const roleLabels = computed(
           </h2>
           <AboutLogoList
             :list="SPONSORS"
-            class="flex-col gap-6 items-start md:flex-row md:items-center md:gap-4"
+            class="grid grid-cols-2 gap-4 md:flex md:flex-row md:items-center md:gap-4"
           />
         </div>