A small documentation change

[aakash-mishra]

I was wondering if we could have a small description alongside all Sessions in README.md
For example : "Session 01 - Introduction" instead of "Session01"

Although, there is an index section I feel it would be handy to have some detail right against the session numbers. (Like with Session11)

I could raise a PR.

[havanagrawal]

This sounds great, go ahead! 😁

[aakash-mishra]

I've raised a PR - #14
It took a year and half more than I expected :P