DEV: replace mailcatcher references with mailhog (#14500)

config/environment.rb

@@ -8,5 +8,5 @@ Discourse::Application.initialize!
 
 # When in "dev" mode, ensure we won't be sending any emails
 if Rails.env.development? && ActionMailer::Base.smtp_settings != { address: "localhost", port: 1025 }
-  fail "In development mode, you should be using mailcatcher otherwise you might end up sending thousands of digest emails"
+  fail "In development mode, you should be using mailhog otherwise you might end up sending thousands of digest emails"
 end

config/environments/development.rb

@@ -42,7 +42,7 @@ Discourse::Application.configure do
 
   config.handlebars.precompile = true
 
-  # we recommend you use mailcatcher https://github.com/sj26/mailcatcher
+  # we recommend you use mailhog https://github.com/mailhog/MailHog
   config.action_mailer.smtp_settings = { address: "localhost", port: 1025 }
 
   config.action_mailer.raise_delivery_errors = true

config/environments/profile.rb

@@ -29,7 +29,7 @@ Discourse::Application.configure do
   # Specifies the header that your server uses for sending files
   config.action_dispatch.x_sendfile_header = 'X-Accel-Redirect' # for nginx
 
-  # we recommend you use mailcatcher https://github.com/sj26/mailcatcher
+  # we recommend you use mailhog https://github.com/mailhog/MailHog
   config.action_mailer.smtp_settings = { address: "localhost", port: 1025 }
 
   # Send deprecation notices to registered listeners