Modernize Ruby hash syntax

config/mail.rb

@@ -2,12 +2,12 @@ require "mail"
 
 Mail.defaults do
   delivery_method :smtp, {
-    :address => "mail.netig.net",
-    :port => 587,
-    :domain => "netig.net",
-    :user_name => "noreply@netig.net",
-    :password => ENV.fetch("SMTP_PASSWORD"),
-    :authentication => "plain",
-    :enable_starttls => :always
+    address: "mail.netig.net",
+    port: 587,
+    domain: "netig.net",
+    user_name: "noreply@netig.net",
+    password: ENV.fetch("SMTP_PASSWORD"),
+    authentication: "plain",
+    enable_starttls: :always
   }
 end