chore(deps): bump altair from 5.1.0 to 5.1.1

Bumps [altair](https://github.com/altair-viz/altair) from 5.1.0 to 5.1.1.
- [Release notes](https://github.com/altair-viz/altair/releases)
- [Commits](vega/altair@v5.1.0...v5.1.1)

---
updated-dependencies:
- dependency-name: altair
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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