[hail] fix docs for anti_joins_rows and _cols (#6859)
[hail] fix docs for anti_joins_rows and _cols (#6859)

They self-referenced instead of referencing the contrary method.
danking/hail,danking/hail,cseed/hail,cseed/hail,hail-is/hail,hail-is/hail,hail-is/hail,hail-is/hail,cseed/hail,hail-is/hail,hail-is/hail,danking/hail,danking/hail,cseed/hail,danking/hail,hail-is/hail,cseed/hail,cseed/hail,cseed/hail,danking/hail,danking/hail,danking/hail,hail-is/hail,cseed/hail