This requirement is for ARB_texture_buffer_object_rgb32, which obviously
needs the UNIFORM_TEXEL_BUFFER bit, not SAMPLED_IMAGE.
Fixes: c3d7de47cd ("docs/zink: add GL 4.0 requirements")
Fixes: 6b38907b7f ("zink: fix feature requirement")
Acked-by: Mike Blumenkrantz <michael.blumenkrantz@gmail.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/17024>