Use correct tox environment for RustPython

Author: domdfcoding

tox.ini

@@ -13,15 +13,15 @@
 #     * pytest
 
 [tox]
-envlist = py36, py37, py38, py39, py310-dev, pypy3, pyrustpython, mypy, build
+envlist = py36, py37, py38, py39, py310-dev, pypy3, rustpython, mypy, build
 skip_missing_interpreters = True
 requires =
     pip>=20.3.3
     tox-envlist>=0.1.0
 isolated_build = True
 
 [envlists]
-test = py36, py37, py38, py39, py310-dev, pypy3, pyrustpython
+test = py36, py37, py38, py39, py310-dev, pypy3, rustpython
 qa = mypy, lint
 cov = py36, coverage