Update to 3.9.7, pip 21.2.4

Author: docker-library-bot

3.9/windows/windowsservercore-ltsc2022/Dockerfile

@@ -11,8 +11,8 @@ SHELL ["powershell", "-Command", "$ErrorActionPreference = 'Stop'; $ProgressPref
 # https://github.com/docker-library/python/pull/557
 ENV PYTHONIOENCODING UTF-8
 
-ENV PYTHON_VERSION 3.9.6
-ENV PYTHON_RELEASE 3.9.6
+ENV PYTHON_VERSION 3.9.7
+ENV PYTHON_RELEASE 3.9.7
 
 RUN $url = ('https://www.python.org/ftp/python/{0}/python-{1}-amd64.exe' -f $env:PYTHON_RELEASE, $env:PYTHON_VERSION); \
 	Write-Host ('Downloading {0} ...' -f $url); \