FIX: Fix the 4D data generator fixture name

Fix the 4D data generator fixture name and add the corresponding entry
to the markers list.

Author: jhlegarreta

pyproject.toml

@@ -221,6 +221,7 @@ env = "PYTHONHASHSEED=0"
 markers = [
     "random_gtab_data: Custom marker for random gtab data tests",
     "random_dwi_data: Custom marker for random dwi data tests",
+    "random_uniform_4d_data: Custom marker for random 4d data tests",
 ]
 filterwarnings = [
   "ignore::DeprecationWarning",

test/conftest.py

@@ -171,7 +171,7 @@ def random_number_generator(request):
 @pytest.fixture(autouse=True)
 def setup_random_uniform_4d_data(request):
     """Automatically generate random data for tests."""
-    marker = request.node.get_closest_marker("random_uniform_4d_data_generator")
+    marker = request.node.get_closest_marker("random_uniform_4d_data")
 
     size = (32, 32, 32, 5)
     a = 0.0