Add information about when configuration changes are applied

## What New Or Updated Would You Like To See?

Add information regarding when configuration changes can be expected to be applied.

## Why Is It Needed?

To remove any confusion about when a change initiated by a Chocolatey command will be applied.

## Additional Context?

Some examples of things to possibly cover:
- Some Chocolatey Licensed features may not not trigger when they're first enabled or disabled.
- What about Chocolatey Agent?
- Chocolatey GUI?

[ClickUp Task](https://app.clickup.com/t/20540031/ENGTASKS-4181)