Replace 'VSCode' by 'Visual Studio Code' in doc (#20441)
Replace 'VSCode' by 'Visual Studio Code' in doc (#20441)

Visual Studio Code is also broadly known as VSCode. But since this document already contained a typo
and Visual Studio Code is not referred as VSCode elsewhere in the CoreCLR documentation I figured it could
be nice to _clean_ this documentation page.
cshung/coreclr,poizan42/coreclr,poizan42/coreclr,krk/coreclr,wtgodbe/coreclr,krk/coreclr,wtgodbe/coreclr,cshung/coreclr,mmitche/coreclr,krk/coreclr,mmitche/coreclr,wtgodbe/coreclr,poizan42/coreclr,krk/coreclr,poizan42/coreclr,poizan42/coreclr,krk/coreclr,wtgodbe/coreclr,mmitche/coreclr,cshung/coreclr,cshung/coreclr,mmitche/coreclr,krk/coreclr,cshung/coreclr,poizan42/coreclr,wtgodbe/coreclr,mmitche/coreclr,mmitche/coreclr,wtgodbe/coreclr,cshung/coreclr