Обсуждение: pgsql: Fix comments related to table AMs

Fix comments related to table AMs

Incorrect function names were referenced.  As this fixes some portions
of tableam.h, that is mentioned in the docs as something to look at when
implementing a table AM, backpatch down to 12 where this has been
introduced.

Author: Hironobu Suzuki
Discussion: https://postgr.es/m/8fe6d672-28dd-3f1d-7aed-ac2f6d599d3f@interdb.jp
Backpatch-through: 12

Branch
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REL_13_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/9678c08184a82deafac9297b9af0fc5cb07ab347

Modified Files
--------------
src/backend/access/heap/heapam.c |  6 +++---
src/include/access/tableam.h     | 21 +++++++++++----------
2 files changed, 14 insertions(+), 13 deletions(-)