Add link to EF Research's AMA Series

Author: ethosdev

src/content/community/get-involved/index.md

@@ -25,6 +25,7 @@ Do you have a background in mathematics, cryptography, or economics? You might b
 
 - [Challenges.ethereum.org](https://challenges.ethereum.org/) - a series of high-value research bounties, where you can earn >$100,000 USD
 - [Ethresear.ch](https://ethresear.ch) - Ethereum’s primary forum for research, and the world’s most influential forum for cryptoeconomics
+- [EF Research AMA](https://old.reddit.com/r/ethereum/comments/vrx9xe/ama_we_are_ef_research_pt_8_07_july_2022) - An ongoing Q&A series with researchers. As each next part opens, anyone can post questions.
 - [Ecosystem Support Program's wishlist](https://esp.ethereum.foundation/wishlist/) - research areas where the Ethereum Ecosystem Support Program is actively seeking grant applications
 
 [Explore more active areas of research](/community/research/).