Update Release to work with Dart Sass

The Release app has been migrated from libsass to dart-sass.
It has a new `bin/dev` file which runs two processess in
`Procfile.dev`, one which runs the rails server and another which
runs `dart-sass` in watch mode. This updates the `docker-compose.yml`
file accordingly.

projects/release/docker-compose.yml

@@ -43,4 +43,4 @@ services:
       REDIS_URL: redis://redis
     expose:
       - "3000"
-    command: bin/rails s --restart
+    command: ./bin/dev