chore(deps): update pre-commit hook gitleaks/gitleaks to v8.21.2 (#265)

| datasource  | package           | from    | to      |
| ----------- | ----------------- | ------- | ------- |
| github-tags | gitleaks/gitleaks | v8.18.0 | v8.21.2 |

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

.pre-commit-config.yaml

@@ -26,7 +26,7 @@ repos:
         args: [--markdown-linebreak-ext=md]
 
   - repo: https://github.com/gitleaks/gitleaks
-    rev: v8.18.0
+    rev: v8.21.2
     hooks:
       - id: gitleaks
         name: GitLeaks Checks