pgsql: doc: Fix grammar in some logical replication pages

doc: Fix grammar in some logical replication pages

Author: Peter Smith <smithpb2250@gmail.com>
Discussion: /messages/by-id/CAHut+PuvY_wYLPJ4DTs7NE9Lu2ty4d-OgZAOJC-NvCM=2wwcQQ@mail.gmail.com
Backpatch-through: 14

Branch
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REL_14_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/220c29e3caa749d1d98a4ff115c650dd04faf38d

Modified Files
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doc/src/sgml/logical-replication.sgml | 10 +++++-----
doc/src/sgml/ref/create_publication.sgml | 2 +-
2 files changed, 6 insertions(+), 6 deletions(-)