[docs] Minor tweaks to AIR intro icons
[docs] Minor tweaks to AIR intro icons

Signed-off-by: Eric Liang <ef0bad1a944ef38afa0cc56e2f0cfe705ff1ffdb@gmail.com>

Signed-off-by: Eric Liang <ef0bad1a944ef38afa0cc56e2f0cfe705ff1ffdb@gmail.com>
ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray,ray-project/ray