package/sdl2: bump version to 2.32.6
Bugfix release, fixing various minor issues:
https://github.com/libsdl-org/SDL/releases/tag/release-2.32.4
https://github.com/libsdl-org/SDL/releases/tag/release-2.32.6
Signed-off-by: Peter Korsgaard <peter@korsgaard.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>