Update readme & link to python 3.7 (RLBot#22)

kcolton · DomNomNom · commit 5c263e073658 · 2019-03-16T11:41:54.000+11:00
The [rlbottraining](https://pypi.org/project/rlbottraining/) dependency from requirements.txt now requires Python 3.7.
diff --git a/README.md b/README.md
@@ -9,7 +9,7 @@ https://www.youtube.com/watch?v=UjsQFNN0nSA
 
 ### Plain instructions
 
-1. Make sure you've installed [Python 3.6 64 bit](https://www.python.org/ftp/python/3.6.5/python-3.6.5-amd64.exe). During installation:
+1. Make sure you've installed [Python 3.7 64 bit](https://www.python.org/downloads/). During installation:
    - Select "Add Python to PATH"
    - Make sure pip is included in the installation
 2. Open Rocket League
