Update docusaurus.config.js

Author: josh-wong

docusaurus.config.js

@@ -158,6 +158,10 @@ const config = {
             to: '/docs/latest/',
             from: ['/', '/docs'],
           },
+          {
+            to: '/ja-jp/docs/latest/overview',
+            from: ['/ja-jp', '/ja-jp/docs'],
+          },
           {
             to: '/docs/latest/releases/release-support-policy',
             from: '/docs/releases/release-support-policy',