Fix ruff config flagged by repo review (#8611)

Author: tqa236

.pre-commit-config.yaml

@@ -21,7 +21,7 @@ repos:
     rev: 'v0.1.9'
     hooks:
       - id: ruff
-        args: ["--fix"]
+        args: ["--fix", "--show-fixes"]
   # https://github.com/python/black#version-control-integration
   - repo: https://github.com/psf/black-pre-commit-mirror
     rev: 23.12.1

pyproject.toml

@@ -232,6 +232,8 @@ exclude = [
   "_typed_ops.pyi",
 ]
 target-version = "py39"
+
+[tool.ruff.lint]
 # E402: module level import not at top of file
 # E501: line too long - let black worry about that
 # E731: do not assign a lambda expression, use a def
@@ -248,7 +250,7 @@ select = [
   "UP", # Pyupgrade
 ]
 
-[tool.ruff.isort]
+[tool.ruff.lint.isort]
 known-first-party = ["xarray"]
 
 [tool.pytest.ini_options]