docs: fixed a small typo

[ImadSaddik]

What does this PR do?

It fixes a typo that I found while reading about quantization.

• dominating it terms → dominating in terms

Before submitting

• This PR fixes a typo or improves the docs (you can dismiss the other checks if that's the case).
• Did you make sure to update the documentation with your changes?
• Did you write any new necessary tests?

Who can review?

[echarlaix]

Thanks for the fix!