[4] Update gazebosim architecture image to Gazebo naming (gazebosim#270)

* Update gazebosim architecture image to Gazebo naming

Signed-off-by: Nate Koenig <[email protected]>

* remove image with different name

Signed-off-by: Louise Poubel <[email protected]>

Co-authored-by: Nate Koenig <[email protected]>
Co-authored-by: Louise Poubel <[email protected]>

Author: 3 people