Update references to new uswds package location

Author: thisisdano

build.sh

@@ -1,5 +1,5 @@
 #!/bin/sh
 
-if [ ! -d "node_modules/uswds/dist" ]; then
+if [ ! -d "node_modules/@uswds/uswds/dist" ]; then
   npm explore uswds -- npm run federalist
 fi