docs,Makefile: ruff -> ruff check (ruff 0.3.0)

warning: `ruff <path>` is deprecated. Use `ruff check <path>` instead.

See also: https://github.com/astral-sh/ruff/blob/v0.3.0/CHANGELOG.md

Makefile

@@ -33,7 +33,7 @@ ruff_format:
 	poetry run ruff format .
 
 ruff:
-	ruff .
+	ruff check .
 
 watch_ruff:
 	if command -v entr > /dev/null; then ${PY_FILES} | entr -c $(MAKE) ruff; else $(MAKE) ruff entr_warn; fi