[typo] in examples/03_evaluate/evaluation.ipynb

[YanZhangADS]

Description

"May be biased, and less explainable than MSE" --> replace MSE with MAE?
"Given a relency definition" --> correct "relency"

"2.1.2 How-to with the evaluation utilities
2.2.2 How-to with evaluation utilities" --> rephrase and be consistent

"2.2.1 Relevancy of recommendation" --> the bullet points should be 2.2.3 and all later bullet points need to be adjusted

Other Comments

[gramhagen]

good catch, feel free to make a pr to address typos! =)

[unnati914]

I can open a PR