pgsql: Last-minute updates for release notes.

Last-minute updates for release notes.

Security: CVE-2022-1552

Branch
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REL_13_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/0c8215c7b6bdf528edab88943438f0db9afad49b

Modified Files
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doc/src/sgml/release-13.sgml | 83 ++++++++++++++++++++++++++++++++------------
1 file changed, 60 insertions(+), 23 deletions(-)