Good day evert. First you need the Sardi icon pkg installed, search SC.
Then you will find the Solus (sailboat) - usr/share/icons/Sardi/scalable/places
start-here-symbolic-solus.svg
Next open Budgie Desktop Settings - Panel - Budgie Menu -Menu Icon - now point to the above address and save and done. You can also modify the sailboat in gimp just save as .svg.
Living on the wild side I am now using emoji 's I have in a Document folder. 😆