pgsql: Doc: fix typo in backup.sgml. - Mailing list pgsql-committers

Doc: fix typo in backup.sgml.

<varname>archive_command</varname> was unnecessarily repeated.

Author: Tatsuo Ishii
Reviewed-by: Amit Kapila
Backpatch-through: 15
Discussion: https://postgr.es/m/flat/20230114.110234.666053507266410467.t-ishii%40sranhm.sra.co.jp

Branch
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REL_15_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/40015cf8ec7a0384a0320c11a31fdeebba4b8e15

Modified Files
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doc/src/sgml/backup.sgml | 3 +--
1 file changed, 1 insertion(+), 2 deletions(-)