Linux download link on README.md is incorrect

[PH-KDX]

The Linux download link in README.md currently points to
https://github.com/Jminding/GeoFS-Desktop/releases/latest/download/GeoFS-linux-x64.zip
while it should point to
https://github.com/Jminding/GeoFS-Desktop/releases/latest/download/GeoFS.AppImage
pls fix kthx