Resolve "Breaking a parameter table in Projects API doc"

## What does this MR do?

- A broken markdown in `Search for projects by name` is fixed.
    - cf. !6681
- Pagination is removed from `Search for projects by name` like other docs as it is shown in [/api/README.html](https://docs.gitlab.com/ce/api/README.html)

## Moving docs to a new location?

No.

## What are the relevant issue numbers?

Closes #23555

See merge request !7007