update formatting in README

sub-headers were not displaying properly

Author: alykhantejani

super_resolution/README.md

@@ -22,9 +22,11 @@ optional arguments:
 ```
 This example trains a super-resolution network on the [BSD300 dataset](https://www2.eecs.berkeley.edu/Research/Projects/CS/vision/bsds/), using crops from the 200 training images, and evaluating on crops of the 100 test images. A snapshot of the model after every epoch with filename model_epoch_<epoch_number>.pth
 
-##Example Usage:
+## Example Usage:
+
+### Train
 
-###Train
 `python main.py --upscale_factor 3 --batchSize 4 --testBatchSize 100 --nEpochs 30 --lr 0.001`
-###Super Resolve
+
+### Super Resolve
 `python super_resolve.py --input_image dataset/BSDS300/images/test/16077.jpg --model model_epoch_500.pth --output_filename out.png`