Fixed typo in notebook02

Author: lombardo-luca

02_pytorch_classification.ipynb

@@ -2487,7 +2487,7 @@
     "      # 1. Forward pass\n",
     "      test_logits = model_3(X_test).squeeze()\n",
     "      test_pred = torch.round(torch.sigmoid(test_logits)) # logits -> prediction probabilities -> prediction labels\n",
-    "      # 2. Calcuate loss and accuracy\n",
+    "      # 2. Calculate loss and accuracy\n",
     "      test_loss = loss_fn(test_logits, y_test)\n",
     "      test_acc = accuracy_fn(y_true=y_test,\n",
     "                             y_pred=test_pred)\n",