chore(deps): bump litestar from 2.19.0 to 2.20.0

Bumps [litestar](https://github.com/litestar-org/litestar) from 2.19.0 to 2.20.0.
- [Release notes](https://github.com/litestar-org/litestar/releases)
- [Commits](litestar-org/litestar@v2.19.0...v2.20.0)

---
updated-dependencies:
- dependency-name: litestar
  dependency-version: 2.20.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]