Change Group "Wall" to Group "Discussion"

I propose that we simply rename “Wall” to “Discussion” to make the comments section of the group more clear.

As a Roblox developer and group owner the language associated with the Group Wall seems antiquated. On the group page, the title of the discussion page is simply “wall.” This does not accurately describe the purpose of the discussion page. In fact, it feels oddly reminiscent of early Roblox where forum use was a key function of Roblox.

This is an easy change that I believe is necessary to better foster community around Roblox groups.

This feature request is being added to my comprehensive group overhaul feature request from 2020: Dan's Group Overhaul 2020