add save_interval to tutorial training command line

Author: zylo117

tutorial/train_shape.ipynb

@@ -305,7 +305,7 @@
       },
       "source": [
         "# consider this is a simple dataset, train head will be enough.\n",
-        "! python train.py -c 0 -p shape --head_only True --lr 1e-3 --batch_size 32 --load_weights weights/efficientdet-d0.pth  --num_epochs 50\n",
+        "! python train.py -c 0 -p shape --head_only True --lr 1e-3 --batch_size 32 --load_weights weights/efficientdet-d0.pth  --num_epochs 50 --save_interval 100\n",
         "\n",
         "# the loss will be high at first\n",
         "# don't panic, be patient,\n",