fix(docker): use `command docker` (#11766)

plugins/docker/docker.plugin.zsh

@@ -38,7 +38,7 @@ fi
 
 {
   # `docker completion` is only available from 23.0.0 on
-  local _docker_version=$(docker version --format '{{.Client.Version}}' 2>/dev/null)
+  local _docker_version=$(command docker version --format '{{.Client.Version}}' 2>/dev/null)
   if is-at-least 23.0.0 $_docker_version; then
     # If the completion file doesn't exist yet, we need to autoload it and
     # bind it to `docker`. Otherwise, compinit will have already done that.
@@ -47,6 +47,6 @@ fi
       autoload -Uz _docker
       _comps[docker]=_docker
     fi
-    docker completion zsh >| "$ZSH_CACHE_DIR/completions/_docker"
+    command docker completion zsh >| "$ZSH_CACHE_DIR/completions/_docker"
   fi
 } &|