Passing `{ signCommit: false}` to `commit` doesn't do anything

[alexr00]

Looks like this is only opt in, not opt out.

vscode/extensions/git/src/git.ts

Lines 1867 to 1869 in f20278e

	if (opts.signCommit) {
	args.push('-S');
	}

Maybe git -c commit.gpgsign=false commit could work?
https://stackoverflow.com/questions/39274739/how-to-disable-git-gpg-signing

[alexr00]

git -c commit.gpgsign=false commit does seem to work.