Upgrade to Python v3.9.13 (#1514)

Author: davprat

CHANGELOG.md

@@ -16,7 +16,7 @@ This file is used to list changes made in each version of the AWS ParallelCluste
 - Add support for generating Slurm Configuration files for Compute Resources with Multiple Instance Types.
 - Reduce timeout from 50 to a maximum of 5min in case of DynamoDB connection issues at compute node bootstrap.
 - Change the logic to number the routing tables when an instance have multiple NICs.
-- Upgrade Python from 3.7.10 to 3.7.13 in response to this [security risk](https://nvd.nist.gov/vuln/detail/CVE-2021-3737).
+- Upgrade Python from 3.7.13 to 3.9.13.
 
 3.2.0
 ------

attributes/default.rb

@@ -38,7 +38,7 @@
 default['cluster']['reserved_base_uid'] = 400
 
 # Python Version
-default['cluster']['python-version'] = '3.7.13'
+default['cluster']['python-version'] = '3.9.13'
 # plcuster-specific pyenv system installation root
 default['cluster']['system_pyenv_root'] = "#{node['cluster']['base_dir']}/pyenv"
 # Virtualenv Cookbook Name