Chore: fix tox indenting

Author: Lode Rosseel

tox.ini

@@ -10,7 +10,7 @@ envlist =
 [testenv]
 dependency_groups =
     testing
-				!dj42: async
+    !dj42: async
     coverage: coverage
     mysql: mysql
     postgres: postgres
@@ -45,8 +45,8 @@ commands =
 
 [testenv:linting]
 dependency_groups =
-	linting
-	async
+  linting
+  async
 commands =
     ruff check --diff {posargs:pytest_django pytest_django_test tests}
     ruff format --quiet --diff {posargs:pytest_django pytest_django_test tests}