docs: link to rust-bitcoinconsensus

Author: jrawsthorne

doc/shared-libraries.md

@@ -48,3 +48,4 @@ The interface is defined in the C header `bitcoinconsensus.h` located in `src/sc
 - [node-libbitcoinconsensus](https://github.com/bitpay/node-libbitcoinconsensus) (Node.js Bindings)
 - [java-libbitcoinconsensus](https://github.com/dexX7/java-libbitcoinconsensus) (Java Bindings)
 - [bitcoinconsensus-php](https://github.com/Bit-Wasp/bitcoinconsensus-php) (PHP Bindings)
+- [rust-bitcoinconsensus](https://github.com/rust-bitcoin/rust-bitcoinconsensus) (Rust Bindings)