ux: update for code in alert

Author: h-enk

assets/scss/components/_alerts.scss

@@ -61,3 +61,9 @@
 .alert .alert-link:focus {
   text-decoration: none;
 }
+
+.alert code {
+  background: darken($beige, 5%);
+  color: $black;
+  padding: 0.25rem 0.5rem;
+}