pgsql: Fix incorrect comments for Memoize struct

Fix incorrect comments for Memoize struct Reported-by: Peter Eisentraut Discussion: https://postgr.es/m/[email protected] Backpatch-through: 14, where Memoize was added Branch -- REL_14_STABLE Details --- https://git.postgresql.org/pg/commitdiff/3f712

pgsql: Fix incorrect comments for Memoize struct

Fix incorrect comments for Memoize struct Reported-by: Peter Eisentraut Discussion: https://postgr.es/m/[email protected] Backpatch-through: 14, where Memoize was added Branch -- master Details --- https://git.postgresql.org/pg/commitdiff/c4a4e760f6b0