Match name of nav item to name of page

What does this MR do and why?

The global nav item for the import landing page no longer reflects everything on the or all of the subitems.

So this updates that.

CC @m_frankiewicz

Screenshots, screen recordings, or links to review app

• Before: https://docs.gitlab.com/ee/user/project/import/index.html
• After: https://eread-match-name-of-nav-item-to-name-of-page.docs.gitlab-review.app/ee/user/project/import/index.html

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