Remove extra line generation from devecontainer compose.yaml

Author: akhilgkrishnan

railties/lib/rails/generators/rails/app/templates/.devcontainer/compose.yaml.tt

@@ -26,8 +26,8 @@ services:
     - <%= dependency %>
 <%- end -%>
 <%- end -%>
-
 <%- if depends_on_system_test? -%>
+
   selenium:
     image: seleniarm/standalone-chromium
     restart: unless-stopped
@@ -43,10 +43,9 @@ services:
     - default
     volumes:
     - redis-data:/data
-<%- end -%>
 
+<%- end -%>
   <%= devcontainer_db_service_yaml(indentation: 4) %>
-
 <%- if !devcontainer_volumes.empty? -%>
 volumes:
 <%- devcontainer_volumes.each do |volume| -%>