docs: fix config.json (#628)

diff --git a/docs/en/latest/config.json b/docs/en/latest/config.json
index 1c2f518..5ec99c9 100644
--- a/docs/en/latest/config.json
+++ b/docs/en/latest/config.json
@@ -38,7 +38,7 @@
         "references/apisix_route_v2beta1",
         "references/apisix_upstream",
         "references/apisix_tls",
-        "references/apisix_apisix_cluster_config"
+        "references/apisix_cluster_config"
       ]
     },
     {