Bump pyupgrade from 3.19.1 to 3.21.0

Bumps [pyupgrade](https://github.com/asottile/pyupgrade) from 3.19.1 to 3.21.0.
- [Commits](asottile/pyupgrade@v3.19.1...v3.21.0)

---
updated-dependencies:
- dependency-name: pyupgrade
  dependency-version: 3.21.0
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -31,7 +31,7 @@ pylint = "^3.2.7"
 isort = "^5.10.1"
 mypy = "^1.18"
 flake8 = "^7.1.2"
-pyupgrade = "^3.19.1"
+pyupgrade = "^3.21.0"
 
 [build-system]
 requires = ["poetry-core>=1.0.0"]