Update batch comments spec
What does this MR do?
Fix spec failure in rspec-mysql-ee 8/10
(see https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/151044312).
What are the relevant issue numbers?
Fix #9411 (closed)
Fix spec failure in rspec-mysql-ee 8/10
(see https://gitlab.com/gitlab-org/gitlab-ee/-/jobs/151044312).
Fix #9411 (closed)