Use warning

Author: karnkaul

guide/src/shader_objects/drawing_triangle.md

@@ -64,7 +64,7 @@ void App::draw(vk::CommandBuffer const command_buffer) const {
 
 ![White Triangle](./white_triangle.png)
 
-Updating our shaders to use interpolated RGB on each vertex:
+Updating the shaders to use interpolated RGB on each vertex:
 
 ```glsl
 // shader.vert

guide/src/shader_objects/shader_program.md

@@ -31,7 +31,9 @@ m_instance = vk::createInstanceUnique(instance_ci);
 // ...
 ```
 
-> This layer _is not_ part of standard Vulkan driver installs, you must package the layer with the application for it to run on environments without Vulkan SDK / Vulkan Configurator. Read more [here](https://docs.vulkan.org/samples/latest/samples/extensions/shader_object/README.html#_emulation_layer).
+<div class="warning">
+This layer <em>is not</em> part of standard Vulkan driver installs, you must package the layer with the application for it to run on environments without Vulkan SDK / Vulkan Configurator. Read more <a href="https://docs.vulkan.org/samples/latest/samples/extensions/shader_object/README.html#_emulation_layer">here</a>.
+</div>
 
 ## `class ShaderObject`