Use Pajamas spaces between buttons in https://gitlab.com/gitlab-org/gitlab/-/requirements_management/requirementsFix

Julia Miocenerequested to merge
384397 into master

What does this MR do and why?

There is no space on this page between buttons. It's just a default space between two inline elements. So I added a space according to Pajamas

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1

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closes #384397 (closed)

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