DOC: Justify exclusion of 3.12 and 3.13 build

Minimizing the explicit build list greatly reduces the
CI burdens for testing resources.

Python 3.12 and 3.13 aim to maintain ABI compatibility with Python 3.11
through the Stable ABI. Extensions compiled against the Python 3.11 ABI
should, in principle, continue to work without recompilation in Python
3.12 and 3.13.

However, relying on the Stable ABI doesn't guarantee
complete compatibility, as behavioral changes or bug fixes in newer
Python versions can still affect extension behavior. It is recommended
to rebuild extensions for each major Python version to ensure optimal
compatibility and to take advantage of any potential performance
improvements.

Author: hjmjohnson

.github/workflows/build-test-package-python.yml

@@ -34,11 +34,18 @@ on:
         description: 'JSON-formatted array of Python 3.x minor version wheel targets'
         required: false
         type: string
+        # Do not build explicit python 3.12 packages. The 3.11 packages support >= 3.11.
+        # Python 3.12 and 3.13 aim to maintain ABI compatibility with Python 3.11 through the Stable ABI.
         default: '["9","10","11"]'
       manylinux-platforms:
         description: 'JSON-formatted array of "<manylinux-image>-<arch>" specializations'
         required: false
         type: string
+        # Select configurations from https://github.com/pypa/manylinux
+        # "_2_28-x86_64"  -- most commonly used platform for developers (largest use case)
+        # "_2_28-aarch64" -- developers with aarch64 likely use quite modern os
+        # "2014-x86_64"   -- fallback packages for deployments to older OS's (i.e. computational cluster environments)
+        #                    2014-x86_64 Wheels are built on CentOS 7 which will reach End of Life (EOL) on June 30th, 2024.
         default: '["_2_28-x64","2014-x64","_2_28-aarch64"]'
       macosx-deployment-target:
         description: 'A string to provide as MACOSX_DEPLOYMENT_TARGET, e.g. "10.15". If left empty (default), the per-architecture default will be used.'