Lil README fix

Author: antaalt

README.md

@@ -59,12 +59,14 @@ This extension contributes the following settings:
 * `shader-validator.includes`: All custom includes for linting.
 * `shader-validator.defines`: All custom macros and their values for linting.
 
-HLSL specific settings: 
+### HLSL specific settings: 
+
 * `shader-validator.hlsl.shaderModel`: Specify the shader model to target for HLSL
 * `shader-validator.hlsl.version`: Specify the HLSL version
 * `shader-validator.hlsl.enable16bitTypes`: Enable 16 bit types support with HLSL
 
-GLSL specific settings:
+### GLSL specific settings:
+
 * `shader-validator.glsl.targetClient`: Specify the OpenGL or Vulkan version for GLSL
 * `shader-validator.glsl.spirvVersion`: Specify the SPIRV version to target for GLSL