Ignore the route that is defined by default

Some test code loads the route file twice. This wasn't a problem
before Rails 7.0 because we didn't have a route.

But, Rails 7.1 has one route by default. So the test application
raises the following error during the load.

```
Invalid route name, already in use: 'rails_health_check'  (ArgumentError)
You may have defined two routes with the same name using the `:as` option, or you may be overriding a route already defined by a resource with the same naming. For the latter, you can restrict the routes created with `resources` as explained here:
https://guides.rubyonrails.org/routing.html#restricting-the-routes-created
```

The routing isn't a matter of this gem, so just ignore that for
running the test.

features/support/rails_template

@@ -3,3 +3,4 @@ if Rails.gem_version < Gem::Version.new('6')
 end
 
 gsub_file "Gemfile", /^ gem 'spring'$/, ' gem "spring", "!= 2.1.1"'
+gsub_file "config/routes.rb",  /^  get/, '  # get'