Add syntax highlighting to markdown.

Author: ZevEisenberg

renderer/README.md

@@ -6,35 +6,35 @@ This directory contains the renderer code and an example for how to interface wi
 
 ## Clone the rive-runtime repo
 
-```
+```sh
 git clone https://github.com/rive-app/rive-runtime.git
 cd rive-runtime/renderer
 ```
 
 ## Build GLFW
 
-```
+```sh
 pushd ../skia/dependencies
 ./make_glfw.sh
 popd
 ```
 
 ## Add build_rive.sh to $PATH
 
-```
+```sh
 export PATH="$PATH:$(realpath ../build)"
 ```
 
 ## Build & run
 
-```
+```sh
 build_rive.sh release
 out/release/path_fiddle [/path/to/my.riv]
 ```
 
 ## Build & serve for WebGL2
 
-```
+```sh
 build_rive.sh ninja wasm release
 cd out/wasm_release
 python3 -m http.server 5555

viewer/README.md

@@ -8,15 +8,15 @@ Rive is built to be platform and subsystem agnostic so you can plug-in any rende
 We currently provide build files for MacOS but we will be adding Windows and others soon too.
 ### MacOS
 All the build scripts are in viewer/build/macosx.
-```
+```sh
 cd viewer/build/macosx
 ```
 You can tell the build script to build and run a Viewer that's backed by a Metal view with our Skia renderer:
-```
+```sh
 ./build_viewer.sh metal skia run
 ```
 An OpenGL example using a tessellating renderer:
-```
+```sh
 ./build_viewer.sh gl tess run
 ```
 Both the Skia and Tess renderers work with either gl or metal options.