Adjust `validator_name` margin-bottom to 0px for improved visual appearance

[RaphaelCornelis]

Expected behavior

Actual behavior

I've noticed that the validator_name element in the Lisk Desktop interface currently has a margin-bottom of 10px. I propose adjusting this margin to 0px. I believe that adjusting the margin-bottom to 0px will improve the overall visual appearance of the interface. This minor change can make the layout look more compact and streamlined, enhancing user experience.

Steps to reproduce

Which version(s) does this affect? (Environment, OS, etc...)

Version 3.0.0-rc.5 (3.0.0-rc.5)