[broken master] Fix time dependent jobs spec

What does this MR do?

This spec was checking for a timer expressed in "%H:%M:%S" on a page.

This check is time sensitive, as the rendered information and the testing object will not be executed at the same time.

This behavior is scheduled for improvement in gitlab-org/gitlab-ce#52135

What are the relevant issue numbers?

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• Tests added for this feature/bug
• Conforms to the code review guidelines
• Conforms to the merge request performance guidelines
• Conforms to the style guides
• Conforms to the database guides