Bump packaging from 25.0 to 26.0 in /ai

Bumps [packaging](https://github.com/pypa/packaging) from 25.0 to 26.0.
- [Release notes](https://github.com/pypa/packaging/releases)
- [Changelog](https://github.com/pypa/packaging/blob/main/CHANGELOG.rst)
- [Commits](pypa/packaging@25.0...26.0)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

ai/requirements.txt

@@ -1,7 +1,7 @@
 black==26.1.0
 click==8.3.1
 mypy-extensions==1.1.0
-packaging==25.0
+packaging==26.0
 pathspec==1.0.3
 platformdirs==4.5.1
 pyink==25.12.0