[ci skip] Fix example commands to refer to the correct versions

What does this MR do?

Fix the install documentation example commands.

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

No

Why was this MR needed?

In the doc we say # Make sure Git is version 2.14.3 or higher but then give example commands for an older version.

Does this MR meet the acceptance criteria?

• Changelog entry added, if necessary
• Documentation created/updated
• API support added
• Tests added for this feature/bug
• Review
  • Has been reviewed by UX
  • Has been reviewed by Frontend
  • Has been reviewed by Backend
  • Has been reviewed by Database
• Conform by the merge request performance guides
• Conform by the style guides
• Squashed related commits together
• Internationalization required/considered
• End-to-end tests pass (package-qa manual pipeline job)

What are the relevant issue numbers?