Update Unity-Agents---Python-API.md

docs/Unity-Agents---Python-API.md

+# Python API
+
-# Loading a Unity Environment
+## Loading a Unity Environment
 
 Python-side communication happens through `UnityEnvironment` which is located in `python/unityagents`. To load a Unity environment from a built binary file, put the file in the same directory as `unityagents`. In python, run:
 
 * `file_name` is the name of the environment binary (located in the root directory of the python project). 
 * `worker_num` indicates which port to use for communication with the environment. For use in parallel training regimes such as A3C.
 
-# Interacting with a Unity Environment
+## Interacting with a Unity Environment
 
 A BrainInfo object contains the following fields: