[UPDATE] Missing element from "Inside the Learning Component"

[Sookeyy-12]

Missing element from "Inside the Learning Component"

• It says that there are three important elements but only two elements are given.
• 

[simoninithomas]

Hey there 👋 , thanks for pointing this out 🤗 . The policy can be count as third element. But given it's part of the agent component I decided to change to 2 elements. I'll close the issue when I merge for the PR

#379