[DOCS] Addition of a resource in YAML

[ShubhamJagtap2000]

Description

Hello @Pradumnasaraf after a long time,

Hope you are well and fine. I just looked at our DevOps repo that I first visited after so long. Since I am working in DevOps in my new job, I would like to add a YAML learning resource to the documentation.

Link to resource => https://realpython.com/python-yaml/

Please give me a heads-up if I should raise a PR.

Thank you.

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