bpo-41712: Avoid runaway regex match in upload scripts (GH-23166)

Author: Pixmew

Tools/msi/purge.py

@@ -12,7 +12,7 @@
 
 from urllib.request import *
 
-VERSION_RE = re.compile(r'(\d+\.\d+\.\d+)(\w+\d+)?$')
+VERSION_RE = re.compile(r'(\d+\.\d+\.\d+)([A-Za-z_]+\d+)?$')
 
 try:
     m = VERSION_RE.match(sys.argv[1])