two people working on the same site

In addition to what Nancy presented, which is fine, there is also a third option that is quite interesting. Finally, it all depends on your environment, the team and the context.

If you have your own server and if you can install your own applications, as soon as teamwork is required, I strongly recommend the use of NextCloud. https://nextcloud.com/install

So if you have access to your own cloud, now it is possible to use WebDav and Dreamweaver offers the management of this protocol to manage collaborative work.

This solution is sometimes preferable to GIT in the fact, that it is not necessary to create branches to work simultaneously, WebDav allows to manage temporary authorizations when a file is already used by a collaborator. Let's say that it's an improved and a bit more efficient checkin/checkout mode.

https://docs.nextcloud.com/server/20/user_manual/en/files/access_webdav.html

Use DW's file check-in/check-out feature alone or with Git versioning.

• https://helpx.adobe.com/ca/dreamweaver/user-guide.html/ca/dreamweaver/using/checking-checking-out-files.ug.html
• https://helpx.adobe.com/dreamweaver/how-to/git-integration.html

That's it in a nutshell.