chore(deps): upgrade pre-commit hook asottile/pyupgrade to v3.21.1 (Pycord-Development#2996)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.pre-commit-config.yaml

@@ -21,7 +21,7 @@ repos:
   #          - --remove-duplicate-keys
   #          - --remove-unused-variables
   - repo: https://github.com/asottile/pyupgrade
-    rev: v3.21.0
+    rev: v3.21.1
     hooks:
       - id: pyupgrade
         exclude: \.(po|pot|yml|yaml)$