Fix typo in Python installation requirement

Author: vovavili

README.md

@@ -104,7 +104,7 @@ $ chpl -M <ChAI>/lib -sEnv.maxNeededRank=15 my_program.chpl
 
 # Current Status
 
-Currently, you need to have a working installation of CMake, PyThon, and Chapel to use ChAI. 
+Currently, you need to have a working installation of CMake, Python, and Chapel to use ChAI. 
 
 ## General build instructions
 
@@ -183,4 +183,4 @@ For 'images/frog.jpg' the top 5 predictions are:
   2: label=leafhopper; confidence=4.5%
   3: label=leaf beetle, chrysomelid; confidence=1.9%
   4: label=weevil; confidence=1.5%
-```
+```