sv_pac_webcontent_limit is in kb not mb

[anormaltwig]

https://github.com/CapsAdmin/pac3/blob/f0df6a366ff2acc616731dda9d69dfdb652cc20b/lua/pac3/core/shared/http.lua#L10 https://github.com/CapsAdmin/pac3/blob/f0df6a366ff2acc616731dda9d69dfdb652cc20b/lua/pac3/core/shared/http.lua#L172