pgsql: Fix outdated comment in tuplesort.h

Fix outdated comment in tuplesort.h This was outdated by 77bae396d. Backpatch-through: 15, where 77bae396d was added Branch -- REL_15_STABLE Details --- https://git.postgresql.org/pg/commitdiff/23f44276123031d21cffeb699d9863149e1c734f Modified Files -- src/include/utils/tup

pgsql: Fix outdated comment in tuplesort.h

Fix outdated comment in tuplesort.h This was outdated by 77bae396d. Backpatch-through: 15, where 77bae396d was added Branch -- master Details --- https://git.postgresql.org/pg/commitdiff/3712e0ed47d126e9aa656a34dd56d52770b672b7 Modified Files -- src/include/utils/tuplesort.