[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/executablebooks/mdformat: 0.7.19 → 0.7.21](hukkin/mdformat@0.7.19...0.7.21)
- [github.com/astral-sh/ruff-pre-commit: v0.8.3 → v0.8.4](astral-sh/ruff-pre-commit@v0.8.3...v0.8.4)

.pre-commit-config.yaml

@@ -79,7 +79,7 @@ repos:
   # mdformat is not enabled by default, but can be run manually with:
   #   pre-commit run mdformat --all-files --hook-stage manual
   - repo: https://github.com/executablebooks/mdformat
-    rev: 0.7.19
+    rev: 0.7.21
     hooks:
       - id: mdformat
         stages: [ manual ]
@@ -102,7 +102,7 @@ repos:
         additional_dependencies: [setuptools-scm]
 
   - repo: https://github.com/astral-sh/ruff-pre-commit
-    rev: v0.8.3
+    rev: v0.8.4
     hooks:
       - id: ruff-format
       - id: ruff