downloads: upgrade CPython 3.9.5 to 3.9.6

Author: indygreg

pythonbuild/downloads.py

@@ -62,10 +62,10 @@
         "python_tag": "cp38",
     },
     "cpython-3.9": {
-        "url": "https://www.python.org/ftp/python/3.9.5/Python-3.9.5.tar.xz",
-        "size": 19058600,
-        "sha256": "0c5a140665436ec3dbfbb79e2dfb6d192655f26ef4a29aeffcb6d1820d716d83",
-        "version": "3.9.5",
+        "url": "https://www.python.org/ftp/python/3.9.6/Python-3.9.6.tar.xz",
+        "size": 19051972,
+        "sha256": "397920af33efc5b97f2e0b57e91923512ef89fc5b3c1d21dbfc8c4828ce0108a",
+        "version": "3.9.6",
         "licenses": ["Python-2.0", "CNRI-Python"],
         "license_file": "LICENSE.cpython.txt",
         "python_tag": "cp39",