Fix typo in 3.9's Whats new. Pyton -> Python (GH-14567)

AppleHolic · Mariatta · commit 0f6f73ff3c2e · 2019-07-02T19:36:01.000-07:00
diff --git a/Doc/whatsnew/3.9.rst b/Doc/whatsnew/3.9.rst
@@ -108,7 +108,7 @@ threading
 
 In a subinterpreter, spawning a daemon thread now raises an exception. Daemon
 threads were never supported in subinterpreters. Previously, the subinterpreter
-finalization crashed with a Pyton fatal error if a daemon thread was still
+finalization crashed with a Python fatal error if a daemon thread was still
 running.
 
 pprint
