Обсуждение: pgsql: Doc: small release note updates.

Doc: small release note updates.

Add items committed in the last 24 hours.  Also correct my failure
to credit Nikita Glukhov for 52ad1e659, which did all the heavy
lifting for 3db322eaa.

Branch
------
REL_13_STABLE

Details
-------
https://git.postgresql.org/pg/commitdiff/7fb326e04b5c367f03b2ebb85348e79a722afef9

Modified Files
--------------
doc/src/sgml/release-13.sgml | 53 +++++++++++++++++++++++++++++++++++++++++++-
1 file changed, 52 insertions(+), 1 deletion(-)