Use keyword arguments for ApplicationService calls

Not all services are using keywords, which breaks those calls in Ruby 3

app/services/ldap_manager/update_email.rb

@@ -1,6 +1,6 @@
 module LdapManager
   class UpdateEmail < LdapManagerService
-    def initialize(dn, address)
+    def initialize(dn:, address:)
       @dn = dn
       @address = address
     end