Set preferred runner in documentation

Co-authored-by: Desmond Cheong <[email protected]>

Author: pmogren

CONTRIBUTING.md

@@ -34,7 +34,7 @@ To set up your development environment:
 ### Developing
 
 1. `make build`: recompile your code after modifying any Rust code in `src/`
-2. `DAFT_RUNNER=py make test`: run tests
+2. `DAFT_RUNNER=native make test`: run tests
 3. `DAFT_RUNNER=ray make test`: set the runner to the Ray runner and run tests
 4. `make docs`: build and serve docs