Might be that you need to mount to /zap/wrk since you're using the packaged scan. It is looking for your YAML file in the Docker image instance as it runs, and since it isn't mounted it can't find it.
Try something like this (might need to mess with backslashes and stuff like that). It mounts your working dir to /zap/wrk and (should!) allow your instance to access your zap.yaml:
docker run -v C:\Users\ssmith4\git\zap\:\zap\wrk\:rw -t owasp/zap2docker-stable bash -c "zap.sh -cmd -addonupdate; zap.sh -cmd -autorun \zap\wrk\zap.yaml"
Hope this helps!