Update the readme typo

[sanjay-kv]

this were i found the typo

[Jisha-tr]

can you assign me this issue. i have worked on this before and I'm beginner.

[souvikpramanikgit]

Hi,

Can you assign me this issue, i have worked on this before and i'm beginner. I’m committed to continually improving the quality of our documentation.

Thank you!

[HawiGirma]

Hi @sanjay-kv ,

I am one of the GSSoC 2024 contributors, and I would like to improve the quality of the documentation in a more organized way. Could you please assign me to this task?

Thank you!

[Shariq2003]

@sanjay-kv sir, As i have already updated the add_your_certificate.md file in GSSOC for 500 points, and know I am also participating in GSSOC Ext, so Should I again have to update the repo for Postman Challenge for 500 points