Bump pyupgrade from 3.20.0 to 3.21.2

Bumps [pyupgrade](https://github.com/asottile/pyupgrade) from 3.20.0 to 3.21.2.
- [Commits](asottile/pyupgrade@v3.20.0...v3.21.2)

---
updated-dependencies:
- dependency-name: pyupgrade
  dependency-version: 3.21.2
  dependency-type: direct:development
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

poetry.lock

@@ -57,7 +57,7 @@ black = "26.3.1" # code formatting
 isort = "5.13.2" # import sorting
 ruff = "0.12.5" # linting
 autoflake = "2.3.3" # remove unused imports
-pyupgrade = "3.20.0" # upgrade syntax to newer versions
+pyupgrade = "3.21.2" # upgrade syntax to newer versions
 pre-commit = "4.5.1" # pre-commit hooks
 bandit = "1.7.10" # security linter
 radon = "6.0.1" # code metrics (human)