Bump from 3.9.19 -> 3.9.20

Author: zanieb

pythonbuild/downloads.py

@@ -44,10 +44,10 @@
         "python_tag": "cp38",
     },
     "cpython-3.9": {
-        "url": "https://www.python.org/ftp/python/3.9.19/Python-3.9.19.tar.xz",
-        "size": 19682840,
-        "sha256": "d4892cd1618f6458cb851208c030df1482779609d0f3939991bd38184f8c679e",
-        "version": "3.9.19",
+        "url": "https://www.python.org/ftp/python/3.9.20/Python-3.9.20.tar.xz",
+        "size": 19648968,
+        "sha256": "6b281279efd85294d2d6993e173983a57464c0133956fbbb5536ec9646beaf0c",
+        "version": "3.9.20",
         "licenses": ["Python-2.0", "CNRI-Python"],
         "license_file": "LICENSE.cpython.txt",
         "python_tag": "cp39",