Add support for Python 3.13.15 and 3.14.7

Release announcement:
https://blog.python.org/2026/08/python-3147-31315/

Changelogs:
https://docs.python.org/release/3.14.7/whatsnew/changelog.html#python-3-14-7-final
https://docs.python.org/release/3.13.15/whatsnew/changelog.html#python-3-13-15-final

Binary builds:
https://github.com/heroku/heroku-buildpack-python/actions/runs/31052140670
https://github.com/heroku/heroku-buildpack-python/actions/runs/31052134976

GUS-W-20590564.
GUS-W-20590511.

Author: edmorley

CHANGELOG.md

@@ -2,6 +2,8 @@
 
 ## [Unreleased]
 
+- The Python 3.14 version alias now resolves to Python 3.14.7. ([#PLACEHOLDER](PLACEHOLDER))
+- The Python 3.13 version alias now resolves to Python 3.13.15. ([#PLACEHOLDER](PLACEHOLDER))
 
 ## [v348] - 2026-07-30
 

lib/python_version.sh

@@ -7,8 +7,8 @@ set -euo pipefail
 LATEST_PYTHON_3_10="3.10.20"
 LATEST_PYTHON_3_11="3.11.15"
 LATEST_PYTHON_3_12="3.12.13"
-LATEST_PYTHON_3_13="3.13.14"
-LATEST_PYTHON_3_14="3.14.6"
+LATEST_PYTHON_3_13="3.13.15"
+LATEST_PYTHON_3_14="3.14.7"
 
 OLDEST_SUPPORTED_PYTHON_3_MINOR_VERSION=10
 NEWEST_SUPPORTED_PYTHON_3_MINOR_VERSION=14

spec/spec_helper.rb

@@ -13,8 +13,8 @@
 LATEST_PYTHON_3_10 = '3.10.20'
 LATEST_PYTHON_3_11 = '3.11.15'
 LATEST_PYTHON_3_12 = '3.12.13'
-LATEST_PYTHON_3_13 = '3.13.14'
-LATEST_PYTHON_3_14 = '3.14.6'
+LATEST_PYTHON_3_13 = '3.13.15'
+LATEST_PYTHON_3_14 = '3.14.7'
 DEFAULT_PYTHON_FULL_VERSION = LATEST_PYTHON_3_14
 DEFAULT_PYTHON_MAJOR_VERSION = DEFAULT_PYTHON_FULL_VERSION.gsub(/\.\d+$/, '')