Update `scope` description

[aeschli]

Verifying #73985

vscode/src/vs/workbench/api/common/configurationExtensionPoint.ts

Line 51 in da827fe

description: nls.localize('scope.description', "Scope in which the configuration is applicable. Available scopes are `application`, `machine`, `window` and `resource`.")

also needs to mention machine-overridable