[hail] Fix concordance log message to print the number of samples (#6571)
[hail] Fix concordance log message to print the number of samples (#6571)


danking/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,cseed/hail,cseed/hail,danking/hail,cseed/hail,danking/hail,hail-is/hail,cseed/hail,danking/hail,cseed/hail,hail-is/hail,danking/hail,danking/hail,cseed/hail,danking/hail,hail-is/hail,hail-is/hail,cseed/hail,cseed/hail,danking/hail