Linkify the reference to the rust RFC process so readers can read up on it easily.
# Zebra RFCs
-We are experimenting with using a process similar to the Rust RFC process to
-document design decisions for Zebra.
\ No newline at end of file
+We are experimenting with using a process similar to [the Rust RFC
+process](https://github.com/ZcashFoundation/zebr://rust-lang.github.io/rfcs/0002-rfc-process.html)
+to document design decisions for Zebra.
