Trial fix for old cross-version upgrades.
Per buildfarm and reports, it seems that 9.X to 18 upgrades were
failing after commit
1fd1bd8710 due to an incorrect regex. Loosen the
regex to accommodate older versions.
Reported-by: vignesh C <vignesh21@gmail.com>
Reported-by: Andrew Dunstan <andrew@dunslane.net>
Discussion: https://postgr.es/m/CALDaNm3GUs+U8Nt4S=V5zmb+K8-RfAc03vRENS0teeoq0Lc6Tw@mail.gmail.com
Discussion: https://postgr.es/m/
ea4cbbc1-c5a5-43d1-9618-
8ff3f2155bfe@dunslane.net