message: fixes broken image link
diff: @@ -31,7 +31,7 @@ mechanisms are required. The designs end up rather heavy and expensive. Bellows-
  devices can be helpful in addressing the volume issue, but are very challenging to design
  for the millions of cycles required, in addition to being difficult to source.
  -![Ventilator Design Overview](functional-block-diagram.png)
  +![Ventilator Design Overview](assets/functional-block-diagram.png)
  [Source](https://docs.google.com/presentation/d/1ye96itSLfdbO9PQT0MSiq6xR2ArqD2MpV1Wj8ORfHeo/edit#slide=id.g7330d84036_1_0)
  