Update content/ja/docs/tutorials/_index.md

Co-authored-by: atoato88 <[email protected]>

Author: kmuto

content/ja/docs/tutorials/_index.md

@@ -52,7 +52,7 @@ content_type: concept
 ## セキュリティ
 
 * [Apply Pod Security Standards at Cluster level](/docs/tutorials/security/cluster-level-pss/)
-* [Apply Pod Security Standards at Namespace level](/ja/docs/tutorials/security/ns-level-pss/)
+* [NamespaceレベルのPod Securityの標準の適用](/docs/tutorials/security/ns-level-pss/)
 * [AppArmor](/docs/tutorials/security/apparmor/)
 * [seccomp](/docs/tutorials/security/seccomp/)