Merge pull request #20227 from Arhell/fix-left-btn-docs

Fix left menu button on mobile (docs home page)

Author: k8s-ci-robot

content/ja/docs/home/_index.md

@@ -4,7 +4,7 @@ title: Kubernetesドキュメント
 noedit: true
 cid: docsHome
 layout: docsportal_home
-class: gridPage
+class: gridPage gridPageHome
 linkTitle: "ホーム"
 main_menu: true
 weight: 10