change selector so that CSS applies correctly

[vladflore]

change selector so that CSS applies only to element with id info inside footer element

Fixes #2583

[github-actions]

Try this Pull Request!

Open Julia and type:

julia> import Pkg
julia> Pkg.activate(temp=true)
julia> Pkg.add(url="https://github.com/vladflore/Pluto.jl", rev="2583")
julia> using Pluto

[pankgeorg]

ah that's true! We add an id with the variable name on each variables, so you can link to that with a fragment (#info in this case) in the URL.