message: Fix minor typo in quick-start-guide.md
  This is a squash merge of typegoose/typegoose#122
diff: @@ -125,4 +125,4 @@ Please note that `new Kitten({})` & `await Kitten.create({})` has no types of Ki
  - Decorated schema configuration classes (like KittenClass above) must use explicit type declaration
  instead of type inference for their types. Otherwise, a property's type will become Mixed! This is
  because Typegoose uses emitDecoratorMetadata to determine types, and by design, emitDecorator emits the
  -explicit type instead of what's inferred (see [microsoft/Typegoose#18995](https://github.com/microsoft/TypeScript/issues/18995)).
  +explicit type instead of what's inferred (see [microsoft/TypeScript#18995](https://github.com/microsoft/TypeScript/issues/18995)).
  