Fixed an incorrect README.md instruction

Author: bachya

README.md

@@ -374,6 +374,6 @@ however, the system object(s) will need to be recreated via
 7. Update `README.md` with any new documentation.
 8. Run tests and ensure 100% code coverage: `make coverage`
 9. Ensure you have no linting errors: `make lint`
-10. Ensure you have no typed your code correctly: `make type`
+10. Ensure you have no typed your code correctly: `make typing`
 11. Add yourself to `AUTHORS.md`.
 12. Submit a pull request!