[Site] Fix LiveMemory components

Fix banner on livememory page

Author: smnandre

ux.symfony.com/assets/styles/components/_Banner.scss

@@ -13,6 +13,11 @@
   display: none;
 }
 
+.Banner .container-xxl {
+  max-width: 1320px;
+  margin: 0 auto;
+}
+
 .BannerInner {
   display: flex;
   flex-direction: column;

ux.symfony.com/assets/styles/demos/live-memory.min.css

@@ -5,6 +5,7 @@
 @import "live-memory/app/reset";
 @import "live-memory/app/root";
 
+@import "../components/Banner";
 @import "../components/Icon";
 
 @import "live-memory/components/Board";