chore(deps): 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] <support@github.com>

Author: dependabot[bot]

requirements/lint.txt

@@ -490,9 +490,9 @@ pytokens==0.1.10 \
     --hash=sha256:c9a4bfa0be1d26aebce03e6884ba454e842f186a59ea43a6d3b25af58223c044 \
     --hash=sha256:db7b72284e480e69fb085d9f251f66b3d2df8b7166059261258ff35f50fb711b
     # via black
-pyupgrade==3.20.0 \
-    --hash=sha256:cd5bf842b863f50adad324a01c30aef60b9f698a9814848094818659c92cd1f4 \
-    --hash=sha256:dd6a16c13fc1a7db45796008689a9a35420bd364d681430f640c5e54a3d351ea
+pyupgrade==3.21.0 \
+    --hash=sha256:3a200cdc537980f371b4867f1d662e37166a7869d7713f309c1c3241c310c754 \
+    --hash=sha256:3e63a882ec1d16f5621736d938952df3cdc2446501fb049e711415cb8d273960
     # via -r requirements/lint.in
 pyyaml==6.0.3 \
     --hash=sha256:00c4bdeba853cc34e7dd471f16b4114f4162dc03e6b7afcc2128711f0eca823c \