pgsql: Fix typo

Fix typo

Introduced in e0eaeafd6646.

Co-authored-by: Alexander Lakhin <exclusion@gmail.com>
Discussion: https://postgr.es/m/83641f59-d566-b33e-ef21-a272a98675aa@gmail.com

Branch
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REL9_6_STABLE

Details
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https://git.postgresql.org/pg/commitdiff/9b6194eb0aa5af1bc8ffba5ff95d0d1e5a9649b0

Modified Files
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src/backend/access/transam/xlog.c               | 2 +-
src/backend/po/de.po                            | 2 +-
src/backend/po/fr.po                            | 2 +-
src/backend/po/ru.po                            | 2 +-
src/backend/po/sv.po                            | 2 +-
src/test/recovery/t/026_overwrite_contrecord.pl | 2 +-
6 files changed, 6 insertions(+), 6 deletions(-)