That is indeed the right file to change. As @KarmaBum mentioned, sometimes a force-refresh is needed due to browser-side caching.
You can also check the game log to make sure that there wasn’t an error during the re-deployment. I don’t think errors come back to the MU screen (which is probably not good - I’ll see if I can fix that.)
For example on my test server I messed up the directory and get:
2018-03-13 15:22:24 DEBUG - AresMUSH::Website::WebsiteDeployCmd: ID=1 Enactor=Faraday Cmd=website/deploy
2018-03-13 15:22:24 INFO - Deployed web portal: sh: /blahblah/ares-webportal/bin/deploy: No such file or directory