[pre-commit.ci] Pre-commit autoupdate. (#23)

updates:
- [github.com/pre-commit/pre-commit-hooks: v5.0.0 → v6.0.0](pre-commit/pre-commit-hooks@v5.0.0...v6.0.0)
- [github.com/pre-commit/mirrors-clang-format: v20.1.7 → v21.1.2](pre-commit/mirrors-clang-format@v20.1.7...v21.1.2)

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

Author: pre-commit-ci[bot]

.pre-commit-config.yaml

@@ -1,13 +1,13 @@
 repos:
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v5.0.0
+    rev: v6.0.0
     hooks:
       - id: trailing-whitespace
       - id: end-of-file-fixer
       - id: check-merge-conflict
       - id: check-case-conflict
   - repo: https://github.com/pre-commit/mirrors-clang-format
-    rev: v20.1.7
+    rev: v21.1.2
     hooks:
     - id: clang-format
       'types_or': [c++, c]