Using SCP to tranfer a file from Windows 10 to Linux Server

I’ve researched and discovered the basic template

scp example-photo.png remote_linux_username@linux_hostname_or_local_ip:/remote/directory/on/linux/pc.

Upon executing the command I receive the following:

The authenticity of host " " can’t be established.
ECDSA key fingerprint is SHA256:*******
Are you sure you want to continue connecting (yes/no)?

and at this point my power shell session will not allow me to type yes to continue. What configuration setting is required to execute this command? Basically I’m attempting to copy a file from my Windows 10 system to the Linux Server in order to install an agent. Thank you