[pre-commit.ci] pre-commit autoupdate

updates:
- [github.com/ITProKyle/pre-commit-hook-yamlfmt: v0.3.0 → v0.3.1](ITProKyle/pre-commit-hook-yamlfmt@v0.3.0...v0.3.1)
- [github.com/executablebooks/mdformat: 0.7.19 → 0.7.21](hukkin/mdformat@0.7.19...0.7.21)

.pre-commit-config.yaml

@@ -42,7 +42,7 @@ repos:
     hooks:
       - id: toml-sort-fix
   - repo: https://github.com/ITProKyle/pre-commit-hook-yamlfmt
-    rev: v0.3.0
+    rev: v0.3.1
     hooks:
       - id: yamlfmt
         args: [--mapping, '2', --offset, '2', --sequence, '4']
@@ -53,7 +53,7 @@ repos:
             \.readthedocs.yml
           )$
   - repo: https://github.com/executablebooks/mdformat
-    rev: 0.7.19
+    rev: 0.7.21
     hooks:
       - id: mdformat
         additional_dependencies: