docs: Fix a few typos

[timgates42]

There are small typos in:

• Chapter02/AnimSpriteComponent.h
• Chapter02/BGSpriteComponent.h
• Chapter07/SoundEvent.h
• Chapter09/SoundEvent.h
• Chapter10/PhysWorld.h
• Chapter10/SoundEvent.h
• Chapter11/PhysWorld.h
• Chapter11/SoundEvent.h
• Chapter12/PhysWorld.h
• Chapter12/SoundEvent.h
• Chapter13/PhysWorld.h
• Chapter13/Renderer.cpp
• Chapter13/SoundEvent.h
• Chapter13/Texture.cpp
• Chapter14/Actor.h
• Chapter14/PhysWorld.h
• Chapter14/Renderer.cpp
• Chapter14/SoundEvent.h
• Chapter14/Texture.cpp
• Errata.md

Fixes:

• Should read beginning rather than begining.
• Should read component rather than componnet.
• Should read projection rather than projeciton.
• Should read overridden rather than overriden.
• Should read anisotropic rather than aniostropic.
• Should read through rather than throuch.
• Should read associative rather than assocaitive.

Semi-automated pull request generated by https://github.com/timgates42/meticulous/blob/master/docs/NOTE.md