fix typo in dblink

When Who What
2023-02-01 18:56:26 Nathan Bossart (bossartn) Closed in commitfest 2023-03 with status: Committed
2023-02-01 18:56:26 Nathan Bossart (bossartn) Changed committer to andresfreund
2023-01-30 22:36:43 Nathan Bossart (bossartn) Changed authors to Nathan Bossart (bossartn)
2023-01-30 22:36:43 Nathan Bossart (bossartn) Changed targetversion to 16
2023-01-30 22:36:36 Nathan Bossart (bossartn) Attached mail thread 20220925232237.p6uskba2dw6fnwj2@awork3.anarazel.de
2023-01-30 22:36:36 Nathan Bossart (bossartn) Created patch record