Chore: fix .gitignore for vscode (refs #6383)

[mysticatea]

I'm sorry, I had suggested a wrong file name in #6383.
This PR corrects the name of a setting file name in .gitignore.

[mention-bot]

@mysticatea, thanks for your PR! By analyzing the annotation information on this pull request, we identified @vitorbal, @nzakas and @ilyavolodin to be potential reviewers

[eslintbot]

LGTM

[vitorbal]

LGTM!

[alberto]

Why don't you ignore the whole dir?

[alberto]

Also, IMO this kind of things should be done as global ignores per user, instead of littering our .gitignorefile with every other editor config

[platinumazure]

@alberto Which is worse? Having a .gitignore with a lot of editors' config files in it, or having those editor config files sneak into the repo?

[alberto]

@platinumazure that's a false dichotomy. We have a review process to prevent that

[nzakas]

@platinumazure @alberto this line of discussion isn't helpful.

Up to this point, we've let people add their own .gitignore entries as necessary. I don't see that as a problem. The less we have to rely on the user doing to setup their dev environment, the better off we are.

[eslintbot]

LGTM

[mysticatea]

I updated it to the whole directory.

[ilyavolodin]

LGTM