Add alt text for home page hero image

Author: jhh

website/templates/home/home_page.html

@@ -25,7 +25,7 @@
     <div class="mx-auto max-w-7xl sm:px-6 lg:px-8">
       <div class="relative shadow-xl sm:overflow-hidden sm:rounded-2xl">
         <div class="absolute inset-0">
-          {% image page.hero_image original class="h-full w-full object-cover" %}
+          {% image page.hero_image original class="h-full w-full object-cover" alt="Banner image of robot on competion field with spectators in background." %}
           <div class="absolute inset-0 bg-blue mix-blend-multiply"></div>
         </div>
         <div class="relative px-4 py-16 sm:px-6 sm:py-24 lg:py-32 lg:px-8">