Fix wrong variable in comparison code for verification (#28)

The code will always print "NKI and NumPy match" even when they might actually differ. The comparison needs to be between the NKI output (out_nki) and the NumPy output (out_np) to properly verify if they produce the same results.

src/tutorials/average_pool2d/average_pool2d_nki_kernels.py

@@ -83,7 +83,7 @@ def np_average_pool_2D(in_tensor, pool_size):
 
   print(in_tensor, out_nki, out_np)
 
-  match = (out_nki == out_nki).all()
+  match = (out_nki == out_np).all()
 
   if match:
     print("NKI and NumPy match")