Update packaging requirement from >=24.2 to >=26.2 in /requirements

Updates the requirements on [packaging](https://github.com/pypa/packaging) to permit the latest version.
- [Release notes](https://github.com/pypa/packaging/releases)
- [Changelog](https://github.com/pypa/packaging/blob/main/CHANGELOG.rst)
- [Commits](pypa/packaging@24.2...26.2)

---
updated-dependencies:
- dependency-name: packaging
  dependency-version: '26.2'
  dependency-type: direct:development
...

Signed-off-by: dependabot[bot] <support@github.com>

Author: dependabot[bot]

requirements/development.txt

@@ -2,7 +2,7 @@ build
 coverage
 ruff
 setuptools>=83.0.0
-packaging>=24.2
+packaging>=26.2
 Sphinx
 twine
 urllib3