pgsql: doc PG 17 relnotes: wording fixes

doc PG 17 relnotes: wording fixes

Reported-by: Elena Indrupskaya

Discussion: /messages/by-id/22110133-bca5-4a99-889c-aa0096423456@postgrespro.ru

Author: Elena Indrupskaya

Backpatch-through: master

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/78e4841c1bbc4ed4cbd3ae7eb8aac5672190d985

Modified Files
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doc/src/sgml/release-17.sgml | 12 ++++++------
1 file changed, 6 insertions(+), 6 deletions(-)