Update 2023_1_jobs.yaml

2023.1 is long time unmaintained, but 2023_1_jobs.yaml was not yet
updated to use the correct unmaintained/2023.1 branch instead of the
deleted stable/2023.1. Now that a new test started to fail on
unmaintained/2023.1 branch [1] neutron-tempest-plugin needs to be
checked out to tag 2023.1-last.

[1] test_multicast_between_vms_on_same_network

Change-Id: I3b89b872e27850e6161e0b40a34c621c2784ac7f
Signed-off-by: Elod Illes <elod.illes@est.tech>
1 file changed