github: Added link to doxygen gh pages for libva
github: Added link to doxygen gh pages for libva

Signed-off-by: Sean V Kelley <2e220d3765e3e059981b3c8d241463f952b3ee5f@posteo.de>

01org/libva-cros,01org/libva-cros,01org/iotg-lin-gfx-libva,01org/libva-cros,01org/iotg-lin-gfx-libva,01org/iotg-lin-gfx-libva