chore: Update ruff config names (DjangoGirls#942)

pyproject.toml

@@ -1,7 +1,7 @@
 [tool.ruff]
 # https://beta.ruff.rs/docs/configuration/
 line-length = 120
-select = [
+lint.select = [
   "E",    # pycodestyle errors
   "W",    # pycodestyle warnings
   "F",    # pyflakes
@@ -38,7 +38,7 @@ extend-exclude = [
   "venv",
 ]
 
-extend-ignore = [
+lint.extend-ignore = [
   "B006",  # Do not use mutable data structures for argument defaults
   "B011",  # tests use assert False
   "B019",  # Use of `functools.lru_cache` or `functools.cache` on methods can lead to memory leaks
@@ -58,15 +58,18 @@ extend-ignore = [
   "SIM102",   # Use a single `if` statement instead of nested `if` statements
 ]
 
-[tool.ruff.per-file-ignores]
+[tool.ruff.lint.per-file-ignores]
 "__init__.py" = [
   "F401"  # unused-import
 ]
 "djangogirls/urls.py" = [
   "RUF005"  # Consider iterable unpacking instead of concatenation
 ]
+"tests/core/test_admin.py" = [
+  "RUF017"  # Avoid quadratic list summation
+]
 
-[tool.ruff.isort]
+[tool.ruff.lint.isort]
 combine-as-imports = true
 known-first-party = [
   "applications",