[ruff] Remove top-level linter settings use the 'lint' section
diff --git a/pyproject.toml b/pyproject.toml
index 822e5ef..d37813f 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -144,6 +144,7 @@
 # (for docstrings, strings and comments in particular).
 line-length = 115
 
+[tool.ruff.lint]
 select = [
     "E",  # pycodestyle
     "F",  # pyflakes