Fixed 8.3.3 data path

exercises/02450Toolbox_Python/Scripts/ex8_3_3.py

@@ -7,7 +7,7 @@ from scipy.io import loadmat
 
 from dtuimldmtools import dbplotf, train_neural_net, visualize_decision_boundary
 
-filename = importlib_resources.files("dtuimldmtools").joinpath("data/data/synth2.mat")
+filename = importlib_resources.files("dtuimldmtools").joinpath("data/synth2.mat")
 
 # Load Matlab data file and extract variables of interest
 mat_data = loadmat(filename)