feat(doc): 文档优化更新

install/registries.yaml

@@ -1,7 +1,7 @@
 mirrors:
   "docker.io":
     endpoint:
-      - "https://mirror.ccs.tencentyun.com"
+      - "docker.m.daocloud.io"
   "registry.k8s.io":
     endpoint:
       - "k8s.m.daocloud.io"