Claim Python 3.11 support and add tests (#9471)

* set up 3.11 tests

* fixup warnings

* sed -i "s/\( *'Pro.*3\.1\)0\(',\)/\10\2\n\11\2/" */setup.py

* update changelog

certbot/CHANGELOG.md

@@ -6,6 +6,7 @@ Certbot adheres to [Semantic Versioning](https://semver.org/).
 
 ### Added
 
+* Support for Python 3.11 was added to Certbot and all of its components.
 * `acme.challenges.HTTP01Response.simple_verify` now accepts a timeout argument which defaults to 30 that causes the verification request to timeout after that many seconds.
 
 ### Changed

certbot/setup.py

@@ -133,6 +133,7 @@ setup(
         'Programming Language :: Python :: 3.8',
         'Programming Language :: Python :: 3.9',
         'Programming Language :: Python :: 3.10',
+        'Programming Language :: Python :: 3.11',
         'Topic :: Internet :: WWW/HTTP',
         'Topic :: Security',
         'Topic :: System :: Installation/Setup',