message: Fix offsets in `triangle` pipeline
  Yes, again...
diff: @@ -330,12 +330,17 @@ impl Pipeline {
  &[(std::mem::size_of::<Uniforms>() * i) as u64],
  );
  - render_pass
  - .set_index_buffer(&self.index_buffer.raw, index_offset);
  + render_pass.set_index_buffer(
  + &self.index_buffer.raw,
  + index_offset * std::mem::size_of::<u32>() as u64,
  + );
  render_pass.set_vertex_buffers(
  0,
  - &[(&self.vertex_buffer.raw, vertex_offset)],
  + &[(
  + &self.vertex_buffer.raw,
  + vertex_offset * std::mem::size_of::<Vertex2D>() as u64,
  + )],
  );
  render_pass.draw_indexed(0..indices as u32, 0, 0..1);
  