fix(docker-exec-via-sock): 修复用户参数处理中的语法错误

docker-exec-via-sock.sh

@@ -63,7 +63,7 @@ docker_exec_create() {
     AttachStderr: true,
     Tty: true,
     Cmd: ["sh", "-c", $cmd]
-  } | if ($user | length) > 0 then .User = $user else . end)
+  } | if ($user | length) > 0 then .User = $user else . end')
 
   DOCKER_LAST_RESPONSE=$(curl --silent --show-error --unix-socket "$DOCKER_SOCKET" \
     -X POST \