Spring Clarify that DI is a type of IoC

The documentation currently states that Inversion of Control (IoC) and Dependency Injection (DI) are the same thing. Although the two terms are related, they are not synonymous, but DI is a type of IoC.

I believe this change is important because using the terms interchangeably really muddies the water about the meaning of these two fundamental concepts of software frameworks.

Comment From: pivotal-cla

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Comment From: pivotal-cla

@Nijco Thank you for signing the Contributor License Agreement!

Comment From: sbrannen

Hi @Nijco,

Congratulations on submitting your first PR for the Spring Framework! 👍

This has been merged into main in a56bf874768cac4dd6643a3525083c63f0035a60 and revised in 23dc5696d9acd89922c66a2c00f857f6b1e2fa41.

Thanks