Declare `GET /notes/new` route

This commit resolves the previous error:

Error:
UserSharesAMessageTest#test_visiting_the_index:
ActionController::RoutingError: No route matches [GET] "/notes/new"

Declare a route to respond to GET /notes/new HTTP requests by routing them to notes#new. The resources call is made with the only: [:new] option to exclude all (actions except for #new) routes generated by a bare resources :notes call.

After making this change, the suite raises a new error:

Error:
UserSharesAMessageTest#test_visiting_the_index:
AbstractController::ActionNotFound: The action 'new' could not be found for NotesController


      config/routes.rb

diff --git a/config/routes.rb b/config/routes.rb
index 4a0c5b7..136a40a 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,4 +1,6 @@
 Rails.application.routes.draw do
   # For details on the DSL available within this file, see https://guides.rubyonrails.org/routing.html
+  get "/notes/new", controller: "notes", action: "new"
+
   get "/", controller: "notes", action: "index"
 end

Declare GET /notes/new route

Declare `GET /notes/new` route