pgsql: Fix thinko in comments.

Fix thinko in comments. A slot can not be stored in a tuple but it's vice versa. Reported-by: Ashutosh Bapat Author: Ashutosh Bapat Reviewed-by: Amit Kapila Discussion: https://postgr.es/m/cafjfprchhnhxdegyjv3kkdwrwo1_nb_kyzm_zsdemozal1a...@mail.gmail.com Branch -- master Details --- h

pgsql: Fix thinko in comments.

Fix thinko in comments. A slot can not be stored in a tuple but it's vice versa. Reported-by: Ashutosh Bapat Author: Ashutosh Bapat Reviewed-by: Amit Kapila Discussion: https://postgr.es/m/cafjfprchhnhxdegyjv3kkdwrwo1_nb_kyzm_zsdemozal1a...@mail.gmail.com Branch -- REL_10_STABLE Details --