Bump pyupgrade from 3.21.0 to 3.21.1

Bumps [pyupgrade](https://github.com/asottile/pyupgrade) from 3.21.0 to 3.21.1.
- [Commits](asottile/pyupgrade@v3.21.0...v3.21.1)

---
updated-dependencies:
- dependency-name: pyupgrade
  dependency-version: 3.21.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]