Update README.md with working discord link

[evelynmitchell]

Thank you for contributing to Swarms!

Replace this comment with:

• Description: a description of the change,
• Issue: the issue # it fixes (if applicable),
• Dependencies: any dependencies required for this change,
• Tag maintainer: for a quicker response, tag the relevant maintainer (see below),
• Twitter handle: we announce bigger features on Twitter. If your PR gets announced and you'd like a mention, we'll gladly shout you out!

Please make sure your PR is passing linting and testing before submitting. Run make format, make lint and make test to check this locally.

See contribution guidelines for more information on how to write/run tests, lint, etc:
https://github.com/kyegomez/swarms/blob/master/CONTRIBUTING.md

If you're adding a new integration, please include:

1. a test for the integration, preferably unit tests that do not rely on network access,
2. an example notebook showing its use.

Maintainer responsibilities:

• General / Misc / if you don't know who to tag: [email protected]
• DataLoaders / VectorStores / Retrievers: [email protected]
• swarms.models: [email protected]
• swarms.memory: [email protected]
• swarms.structures: [email protected]

If no one reviews your PR within a few days, feel free to email Kye at [email protected]

See contribution guidelines for more information on how to write/run tests, lint, etc: https://github.com/kyegomez/swarms

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📚 Documentation preview 📚: https://swarms--739.org.readthedocs.build/en/739/