Mac won't boot up using Bootcamp after trying to resize partitions
Your Windows installation is probably permanently ruined.

Disk Utility can't resize NTFS partitions correctly. When it tries to, it corrupts some of the data inside. Unfortunately, Windows may not be able to boot anymore.

What you can do, however, is try to mount the partition (usually labeled BOOTCAMP) in macOS and copy whatever important files you have there onto a backup drive or other external/internal storage.

Sorry to say, but Windows may not boot ever again.

I once made this exact mistake and had to reinstall Windows completely.