dev: update tox twine check command

Author: offbyone

tox.ini

@@ -94,10 +94,12 @@ deps =
     -rdocs/source/requirements.txt
     sphinx_rtd_theme
     twine >= 3.4.2
+    build
     .
 commands =
     sphinx-build -E -W -c docs/source/ -b html docs/source/ docs/build/html
-    twine check --strict {distdir}/*
+    python -m build
+    twine check --strict dist/*
 
 [pytest]
 addopts = -q -nauto