Bump textual from 7.2.0 to 7.3.0

Bumps [textual](https://github.com/Textualize/textual) from 7.2.0 to 7.3.0.
- [Release notes](https://github.com/Textualize/textual/releases)
- [Changelog](https://github.com/Textualize/textual/blob/main/CHANGELOG.md)
- [Commits](Textualize/textual@v7.2.0...v7.3.0)

---
updated-dependencies:
- dependency-name: textual
  dependency-version: 7.3.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]