Local galaxy - how to properly modify login box message?

I’m setting up a local galaxy instance that will use PAM for authentication using our institution’s credentials. I’m trying to modify the login box to say “Please enter Username” instead of “Public Name or Email Address”. I see this is set in <galaxy_root>/static/src/components/login/Login.vue.
If I modify that file, I get on restart “The Galaxy client is out of date and will be built now.” followed by yarn messages. Is that the correct place to change it or should that file be left alone?
Thank you!