gitleaksをアップデートしてあげたよ！ (#1415)

Co-authored-by: github-actions[bot] <41898282+github-actions[bot]@users.noreply.github.com>

Author: github-actions[bot]

.pre-commit-config.yaml

@@ -1,6 +1,6 @@
 ---
 repos:
   - repo: https://github.com/zricethezav/gitleaks
-    rev: v8.18.0
+    rev: v8.18.1
     hooks:
       - id: gitleaks