update EnsureTyped usage (#1405)

Fixes #1404


### Checks
<!--- Put an `x` in all the boxes that apply, and remove the not
applicable items -->
- [ ] Avoid including large-size files in the PR.
- [ ] Clean up long text outputs from code cells in the notebook.
- [ ] For security purposes, please check the contents and remove any
sensitive info such as user names and private key.
- [ ] Ensure (1) hyperlinks and markdown anchors are working (2) use
relative paths for tutorial repo files (3) put figure and graphs in the
`./figure` folder
- [ ] Notebook runs automatically `./runner.sh -t <path to .ipynb file>`

Signed-off-by: Wenqi Li <[email protected]>

Author: wyli

acceleration/fast_model_training_guide.md

@@ -270,14 +270,13 @@ For example:
 ```py
 train_transforms = [
     LoadImaged(...),
-    AddChanneld(...),
+    EnsureChannelFirstd(...),
     Orientationd(...),
     Spacingd(...),
     ScaleIntensityRanged(...),
     CropForegroundd(...),
     FgBgToIndicesd(...),
-    EnsureTyped(..., data_type="tensor"),
-    ToDeviced(..., device="cuda:0"),
+    EnsureTyped(..., device="cuda:0"),
     RandCropByPosNegLabeld(...),
 ]
 dataset = CacheDataset(..., transform=train_trans)