chore(deps): bump packaging from 26.2 to 26.3 (#15397)

Bumps [packaging](https://github.com/pypa/packaging) from 26.2 to 26.3.
- [Release notes](https://github.com/pypa/packaging/releases)
- [Changelog](https://github.com/pypa/packaging/blob/main/CHANGELOG.rst)
- [Commits](pypa/packaging@26.2...26.3)

---
updated-dependencies:
- dependency-name: packaging
  dependency-version: '26.3'
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

ci-constraints-requirements.txt

@@ -110,7 +110,7 @@ nox==2026.4.10 ; python_full_version < '3.10'
     # via cryptography (pyproject.toml:dev)
 nox==2026.7.11 ; python_full_version >= '3.10'
     # via cryptography (pyproject.toml:dev)
-packaging==26.2
+packaging==26.3
     # via
     #   build
     #   dependency-groups