Update README.md

 Added Discord and Twitter badges.

README.md

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 ☀️ *OpenFHE-rs is a joint project by [FairMath](https://fairmath.xyz/) & [OpenFHE](https://www.openfhe.org/)*
 
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+[![Discord](https://img.shields.io/discord/1163764915803279360?logo=discord&label=Fair%20Math)](https://discord.com/invite/NfhXwyr9M5)
+[![Twitter](https://img.shields.io/twitter/follow/FairMath)](https://twitter.com/FairMath)
 
 OpenFHE-rs is a Rust interface for the OpenFHE library. OpenFHE is known for its wide range of Fully Homomorphic Encryption (FHE) schemes, 
 all implemented in C++. We're bringing this capability to Rust developers.