change the library description

[sevlenormand-glitch]

the description of the library is :

This is a simple library to load images of various formats as SDL surfaces. It can load BMP, GIF, JPEG, LBM, PCX, PNG, PNM (PPM/PGM/PBM), QOI, TGA, XCF, XPM, and simple SVG format images. It can also load AVIF, JPEG-XL, TIFF, and WebP images, depending on build options.

it was correct for sdl2 but for SDL3, it should be
This is a simple library to load images of various formats as SDL surfaces. It can load BMP, GIF, JPEG, LBM, PCX, PNG, PNM (PPM/PGM/PBM), QOI, TGA, XCF, XPM, and simple SVG format images. It can also load AVIF, JPEG-XL, TIFF, and WebP images, depending on optionnal libraries.