Bump pyupgrade from 3.20.0 to 3.21.0

Bumps [pyupgrade](https://github.com/asottile/pyupgrade) from 3.20.0 to 3.21.0.
- [Commits](asottile/pyupgrade@v3.20.0...v3.21.0)

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

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

Author: dependabot[bot]

pyproject.toml

@@ -27,7 +27,7 @@ dependencies    = [
     "aiofiles==24.1.0",
     "autoflake==2.3.1",
     "isort==6.1.0",
-    "pyupgrade==3.20.0",
+    "pyupgrade==3.21.0",
     "reorder-python-imports==3.15.0",
 ]
 

requirements.txt

@@ -1,5 +1,5 @@
 aiofiles==24.1.0
 autoflake==2.3.1
 isort==6.1.0
-pyupgrade==3.20.0
+pyupgrade==3.21.0
 reorder-python-imports==3.15.0

requirements_test_pre_commit.txt

@@ -3,4 +3,4 @@ isort==6.1.0
 mccabe==0.7.0
 pycodestyle==2.14.0
 pyflakes==3.4.0
-pyupgrade==3.20.0
+pyupgrade==3.21.0