pgsql: Doc: correct erroneous entry in this week's minor release notes.

Doc: correct erroneous entry in this week's minor release notes.

The patch to disallow a NULL specification in combination with
GENERATED ... AS IDENTITY applied to both ALWAYS and BY DEFAULT
variants of that clause, not only the former.

Noted by Shay Rojansky.

Discussion: https://postgr.es/m/CADT4RqAwD3A=RvGiQU9AiTK-6VeuXcycwPHmJPv_OBCJFYOEww@mail.gmail.com

Branch
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REL_13_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/6a4c07156802fa2efee75c273a7d5d9ae81bda28

Modified Files
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doc/src/sgml/release-13.sgml | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)