tiny edit on runtime variables section

[jayoung]

tiniest of tiny edits: in this section, on runtime variables:

I see this written:
Other formats that are accepted include: "memory: 2GB"

I think (at least VScode's linter thinks) that the 2Gb needs quotes around it to work. to make it clearer also drop the quotes around the entire thing and write it like this:
Other formats that are accepted include: memory: "2GB",