Commit 2eb34ac3 changed error messages emit when commands are
rejected during recovery. But it forgot to update the standbycheck
regression test output with those error message changes.

Reported-by: Michail Nikolaev
Author: Michail Nikolaev
Reviewed-by: Fujii Masao
Discussion: https://postgr.es/m/CANtu0ojFPgcspH=0nNZ+qmu0XD69sXKtVttuSoYKHawRADSQGg@mail.gmail.com