update .gitignore

zhangjian

2023-05-30 2d38bc50529f2f2c567b01825ff7d820a606279e

ard-work/target/classes/com/ruoyi/device/hiksdk/util/hikSdkUtil/HCNetSDK$NET_DVR_PREVIEWINFO.class does not exist in tree 66330073bbbd0d26e180695097292199a08a9653