build(deps): update packaging requirement from <25.1 to <26.1 in /requirements (#21642)

build(deps): update packaging requirement 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](https://github.com/pypa/packaging/compare/23.0...26.0)

---
updated-dependencies:
- dependency-name: packaging
  dependency-version: '26.0'
  dependency-type: direct:production
...

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