updated light graphic and content

styles/light/_light-theme.scss

@@ -677,6 +677,10 @@ pre code {
   #run-a-network-node .text-cards a {
     color: $black;
   }
+
+  #xrpl-blog  .blog-graphic {
+    content: url("/assets/img/community/lightmode/community-blog@2x.png");
+  }
   
   #xrpl-events .text-light {
     color: $black !important;