pgsql: doc PG 18 relnotes: adjust libpq trace & potocol version items

doc PG 18 relnotes: adjust libpq trace & potocol version items

Reported-by: Jelte Fennema-Nio

Discussion: /messages/by-id/CAGECzQQj0r_JX38fa-_kepp9UaMzCcujRAYaJG2+fPks1b8MVg@mail.gmail.com

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/9f8fcadb2087d3178dc01de37e59ba9a0c70dd31

Modified Files
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doc/src/sgml/release-18.sgml | 6 ++++++
1 file changed, 6 insertions(+)