Fixes training command line example in README.

PiperOrigin-RevId: 266992414
Change-Id: I1a4715ad392c710b61a33e4ddc629c271e1ab95a

Author: Johannes Ball?

README.md

@@ -156,7 +156,7 @@ To train the model, you need to supply it with a dataset of RGB training images.
 They should be provided in PNG format. Training can be as simple as the
 following command:
 ```bash
-python bls2017.py --verbose --train_glob="images/*.png" train
+python bls2017.py --verbose train --train_glob="images/*.png"
 ```
 
 This will use the default settings. The most important parameter is `--lambda`,