Fix bad links

Author: SimonDarksideJ

articles/getting_to_know/howto/HowTo_AutomaticRotation.md

@@ -26,7 +26,7 @@ If you leave [SupportedOrientations](xref:Microsoft.Xna.Framework.GraphicsDevice
 
 ### Concepts
 
-- [What Is a Back Buffer?](WhatIs_BackBuffer.md)
+- [What Is a Back Buffer?](../whatis/graphics/WhatIs_BackBuffer.md)
 
 ### Reference
 

articles/getting_to_know/howto/HowTo_MobileBestPractices.md

@@ -80,4 +80,3 @@ If you implement automatic game saving, check for an automatically saved state w
 
 - [Creating a your first MonoGame Game](https://monogame.net/articles/getting_started/index.html)
 - [Setting Aspect ratios for your game](graphics/HowTo_AspectRatio.md)  
-- [Saving data using MonoGame](HowTo_SaveData.md)  

articles/getting_to_know/howto/HowTo_PlayerResize.md

@@ -39,9 +39,9 @@ On Desktop, it is normally possible for the user to change how the game window i
 
 ### Concepts
 
-- [What Is 3D Rendering?](../../whatis/graphics/WhatIs_3DRendering.md)
-- [What Is a Back Buffer?](../../whatis/graphics/WhatIs_BackBuffer.md)
-- [What Is a Viewport?](../../whatis/graphics/WhatIs_Viewport.md)
+- [What Is 3D Rendering?](../whatis/graphics/WhatIs_3DRendering.md)
+- [What Is a Back Buffer?](../whatis/graphics/WhatIs_BackBuffer.md)
+- [What Is a Viewport?](../whatis/graphics/WhatIs_Viewport.md)
 
 ### Reference