Bump rails to 6.1.7.3 (#221)

* Bump rails to 6.1.7.3
* Bump rspec-rails to 4.0.2 (to make specs work again)
* Fix ReorderWorkflow to solve deprecation warning

Gemfile

@@ -5,7 +5,7 @@ ruby '3.0.6'
 
 gem 'rake', '12.3.3'
 
-gem 'rails', '6.0.5'
+gem 'rails', '6.1.7.3'
 
 gem 'pg', '1.3.5'
 
@@ -40,7 +40,7 @@ gem 'kaminari', '1.2.2'
 group :development, :test do
   gem 'byebug', platforms: [:mri, :mingw, :x64_mingw]
 
-  gem 'rspec-rails', '3.8.3'
+  gem 'rspec-rails', '4.0.2'
   gem 'factory_bot_rails', '5.0.2'
 end