Add Discord channel link to README.md

[Ananya44444]

The project has a Discord channel, but the invite link is not mentioned in README.md.
It would be helpful to add it for better community access.

[ParasSalonia]

I want to be assign

[Ananya44444]

@ParasSalonia

I want to be assign

I’ve already submitted a PR that resolves this issue, so it’s covered for now.
You’re welcome to pick up another open issue!