docs: minimum Python version is 3.9

Author: daniel-jones-dev

CHANGELOG.md

@@ -5,10 +5,12 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 ## [Unreleased]
-### Added
-<!-- * add to here -->
-### Changed
-<!-- * add to here -->
+### Deprecated
+* Dropped support for Python 3.8 and older.
+### Security
+* Updated `requests` minimum version to 2.32.4 to resolve security advisories
+  CVE-2024-47081 and CVE-2024-35195.
+
 
 ## [1.22.0] - 2025-04-30
 ### Added

README.md

@@ -41,15 +41,14 @@ explained in this [bug report][bug-report-ubuntu-2204].
 
 ### Requirements
 
-The library is tested with Python versions 3.6 to 3.11.
+The library is tested with Python versions 3.9 to 3.13.
 
 The `requests` module is used to perform HTTP requests; the minimum is version
-2.0.
+2.32.4.
 
-Starting in 2024, we will drop support for older Python versions that have
+We periodically drop support for older Python versions that have
 reached official end-of-life. You can find the Python versions and support
 timelines [here][python-version-list].
-To continue using this library, you should update to Python 3.8+.
 
 ## Usage