Update getting_started_part_four.md

Closed username-removed-239147 requested to merge batok/gitlab-ee:patch-3 into master

What does this MR do?

Just change two words in text

Are there points in the code the reviewer needs to double check?

No.

Why was this MR needed?

Better quality

Screenshots (if relevant)

None

Does this MR meet the acceptance criteria?

What are the relevant issue numbers?

None