added few resources (#60)

Author: rtarun9

resources/index.html

@@ -36,6 +36,7 @@
 		* [bell0bytes Blog - DirectX Fundamentals](https://bell0bytes.eu/direct-x-com/)
 		* [3DGEP Blog - DirectX Tutorials](https://www.3dgep.com/category/graphics-programming/directx/)
 		* [DirectX Specification](https://microsoft.github.io/DirectX-Specs/)
+		* [Braynzarsoft - DirectX11 and DirectX12 resources](https://www.braynzarsoft.net/)
 
 		## Metal
 		* [Metal Specification](https://developer.apple.com/documentation/metal)
@@ -53,11 +54,13 @@
 		* [Vulkan 1.2 Specification](https://www.khronos.org/registry/vulkan/specs/1.2-extensions/html/chap2.html)
 		* [Vulkan Guide](https://vkguide.dev/)
 		* [Vulkan Tutorial](https://vulkan-tutorial.com/)
+		* [Brendan Galea's Vulkan Game Engine series](https://www.youtube.com/watch?v=Y9U9IE0gVHA&list=PL8327DO66nu9qYVKLDmdLW_84-yE4auCR)
 
 		# Shader Programming
 
 		## Guides
 		* [3D Game Shaders for Beginners](https://github.com/lettier/3d-game-shaders-for-beginners)
+		* [Book Of Shaders](https://thebookofshaders.com/)
 
 		# Techniques
 
@@ -76,6 +79,9 @@
 
 		# Various Related Resources
 		* [Fix Your Timestep](https://gafferongames.com/post/fix_your_timestep/)
+		* [Finding Your Home in Game Graphics Programming](http://alextardif.com/LearningGraphics.html)
+		* [Game Math](https://gamemath.com/)
+		* [A Comparison of Modern Graphics APIs](https://alain.xyz/blog/comparison-of-modern-graphics-apis)
 
 	</code>