Add a link to the project site in README (#3319)

README.md

@@ -15,7 +15,7 @@
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-Anchor is a framework for Solana's [Sealevel](https://medium.com/solana-labs/sealevel-parallel-processing-thousands-of-smart-contracts-d814b378192) runtime providing several convenient developer tools for writing smart contracts.
+[Anchor](https://www.anchor-lang.com/) is a framework for Solana's [Sealevel](https://medium.com/solana-labs/sealevel-parallel-processing-thousands-of-smart-contracts-d814b378192) runtime providing several convenient developer tools for writing smart contracts.
 
 - Rust eDSL for writing Solana programs
 - [IDL](https://en.wikipedia.org/wiki/Interface_description_language) specification