Fix rails 7.1 removal, use to_fs(:dash) instead of Range#to_s(:dash)

Rails 7.0 was reporting this warning:

DEPRECATION WARNING: Range#to_s(:dash) is deprecated. Please use Range#to_fs(:dash) instead. (called from port_range_helper at /home/runner/work/manageiq-ui-classic/manageiq-ui-classic/app/helpers/security_group_helper/textual_summary.rb:105)

Author: jrafanie

app/helpers/security_group_helper/textual_summary.rb

@@ -102,7 +102,7 @@ def port_range_helper(rule)
     elsif rule.port == rule.end_port
       rule.port.to_s
     else
-      rule.port_range.to_s(:dash)
+      rule.port_range.to_fs(:dash)
     end
   end
 end