Fix image links in renderer documentation

Summary: Repo has jpgs but docs/website want pngs.

Reviewed By: nikhilaravi

Differential Revision: D35596475

fbshipit-source-id: 4cafd405c06c0eb339001a8db2422dbbd1f8f28a

Author: Krzysztof Chalupka

docs/notes/renderer.md

@@ -21,7 +21,7 @@ Our implementation decouples the rasterization and shading steps of rendering. T
 
 ## <u>Get started</u>
 
-To learn about more the implementation and start using the renderer refer to [getting started with renderer](renderer_getting_started.md), which also contains the [architecture overview](assets/architecture_overview.png) and [coordinate transformation conventions](assets/transformations_overview.png).
+To learn about more the implementation and start using the renderer refer to [getting started with renderer](renderer_getting_started.md), which also contains the [architecture overview](assets/architecture_renderer.jpg) and [coordinate transformation conventions](assets/transforms_overview.jpg).
 
 ## <u>Tech Report</u>