fix(dashmate): remove dash-cli from protx registration instructions

[pshenmic]

Issue being fixed or feature implemented

dashmate setup command for new masternodes displays an instructions to register it in the network. This is usually done from the Dash Core GUI wallet and dash-cli prefix is obsolete, as well as slashes.

What was done?

Roved dash-cli and slashes from the dashmate setup

How Has This Been Tested?

Locally

Breaking Changes

No

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have added "!" to the title and described breaking changes in the corresponding section if my code contains any
• I have made corresponding changes to the documentation if needed

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone

[shumkov]

👍