pgsql: doc PG 17 relnotes: add logical replication apply subtrans item

doc PG 17 relnotes: add logical replication apply subtrans item

Reported-by: Masahiko Sawada

Discussion: /messages/by-id/CAD21AoD5jjB+M+BK5JTis8=W1g8KsS1961FyMqRpj=NBFXrJeA@mail.gmail.com

Backpatch-through: master

Branch
------
master

Details
-------
https://git.postgresql.org/pg/commitdiff/771fa58df275d0361fcba2b1f97e4d96617fc345

Modified Files
--------------
doc/src/sgml/release-17.sgml | 11 +++++++++++
1 file changed, 11 insertions(+)