Hi There,
This is hapenning because the size of your logo x navbar link spacing x navabar font size x navbar letter spacing are all together to big for the space you have.
I believe you have a lot of space between the navbar links that you can use to fix it. so please go to Appereance / Customizer / Header and scroll down until you find Navbar Top Link Spacing and try to play with the values until you find the result you are looking for.
Please see image attached:
Hope that helps,
Joao