Update instructions for sourcekit-lsp

[fxn]

I had to Google around to find these simple couple of settings work for modern installations. I am just learning Swift, not sure about the deletion of the tool chain bit. In any case, you do not need that SourceKit-LS extension anymore, right?

[vknabel]

Hi @fxn!
Thanks for the great documentation improvements!

What do you mean with not sure about the deletion of the tool chain bit? Maybe I can help.

[fxn]

Oh! The original docs had this sentence:

optionally to your toolchain sourcekit-lsp.toolchainPath

I don't have that plugin and don't know if there is an equivalent recommendation that is worthwhile to keep. With those two settings this seems to be working fine.

Thanks for maintaining this extension, works like a charm!

[vknabel]

Oh I see. A toolchain contains Swift clang and a few other tools.
So this is only relevant, when having multiple Swift versions installed.
Thanks!