downloads: upgrade CPython 3.9.15 -> 3.9.16

Author: indygreg

pythonbuild/downloads.py

@@ -44,10 +44,10 @@
         "python_tag": "cp38",
     },
     "cpython-3.9": {
-        "url": "https://www.python.org/ftp/python/3.9.15/Python-3.9.15.tar.xz",
-        "size": 19712208,
-        "sha256": "12daff6809528d9f6154216950423c9e30f0e47336cb57c6aa0b4387dd5eb4b2",
-        "version": "3.9.15",
+        "url": "https://www.python.org/ftp/python/3.9.16/Python-3.9.16.tar.xz",
+        "size": 19738796,
+        "sha256": "22dddc099246dd2760665561e8adb7394ea0cc43a72684c6480f9380f7786439",
+        "version": "3.9.16",
         "licenses": ["Python-2.0", "CNRI-Python"],
         "license_file": "LICENSE.cpython.txt",
         "python_tag": "cp39",