Setting or change WSL root password

1. Open PowerShell Console
2. Comand
PS C:\Users\holyx> wsl -u root
root@LAPTOP-EEH80F78:/mnt/c/Users/holyx#
root@LAPTOP-EEH80F78:/mnt/c/Users/holyx# passwd
Enter new UNIX password:
Retype new UNIX password:
passwd: password updated successfully