Map old DSIT name to new one

govuk-frontend removed the 'and' from their class. We will need to use this temporary mapping class, then change the name in Whitehall, and then remove this class.

app/assets/stylesheets/govuk_publishing_components/components/helpers/_brand-colours.scss

@@ -56,11 +56,9 @@
   }
 }
 
-// new colour for DSIT for use until govuk-frontend#3523 has been released
-
 .brand--department-for-science-innovation-and-technology {
   &.brand__border-color,
   .brand__border-color {
-    border-color: #045f71;
+    border-color: govuk-organisation-colour("department-for-science-innovation-technology", $contrast-safe: false);
   }
 }