Question about 2.0.9 upgrade (will it change my work?)

I have 2.0.8 and would like to upgrade to 2.0.9. We’ve made changes to the layout of our checkout and the ‘no items in cart’ message. Additionally, I have made the AJAX notifications larger with more padding so they’re more noticeable.

Am I going to lose these changes if I upgrade to 2.0.9?

Thank you.