downloads: upgrade CPython 3.9.6 to 3.9.7

Author: indygreg

pythonbuild/downloads.py

@@ -62,10 +62,10 @@
         "python_tag": "cp38",
     },
     "cpython-3.9": {
-        "url": "https://www.python.org/ftp/python/3.9.6/Python-3.9.6.tar.xz",
-        "size": 19051972,
-        "sha256": "397920af33efc5b97f2e0b57e91923512ef89fc5b3c1d21dbfc8c4828ce0108a",
-        "version": "3.9.6",
+        "url": "https://www.python.org/ftp/python/3.9.7/Python-3.9.7.tar.xz",
+        "size": 19123232,
+        "sha256": "f8145616e68c00041d1a6399b76387390388f8359581abc24432bb969b5e3c57",
+        "version": "3.9.7",
         "licenses": ["Python-2.0", "CNRI-Python"],
         "license_file": "LICENSE.cpython.txt",
         "python_tag": "cp39",