3.6.0 is 3.6-dev-alpha10-dev, just a new version number was created.
The binaries attached to the release were built using Github Actions, instead of manually build using mingw and Visual Studio. And it is only for the Windows target.
The attached assets:
rls-classic.zip: contains the binary with std renderer
rls-modern.zip: contains the binary glsl renderer
rls-all.zip: contains the binary with both renderer
'rls' stand for 'release'
If there are performance issues with these compared to the 3.6-dev-alpha10-dev binaries, please report.