chore(deps): update pre-commit hook davidanson/markdownlint-cli2 (v0.20.0 → v0.21.0) (#456)

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

.pre-commit-config.yaml

@@ -44,7 +44,7 @@ repos:
         args: [--autofix, --no-sort-keys]
 
   - repo: https://github.com/DavidAnson/markdownlint-cli2
-    rev: v0.20.0
+    rev: v0.21.0
     hooks:
       - id: markdownlint-cli2
         args: [--fix]