silksong steam page update

The silksong steam store have been updated with a ton of stuff, an actual update written out by team cherry. Silksong is confirmed to be usable with gforce. A new asset called a library_header was added. Lastely, team cherry's copywright was been updated. They have changed their copywright on the silksong steam page from 2019 to 2025 in one go.

I have to redo 3D and 3F, along with finishing 2B (i think) and dont forget 2C and 2D