Update README.md

Author: wenbinf

README.md

@@ -49,7 +49,7 @@ If you have any questions, please contact [hello@listennotes.com](hello@listenno
 
 ## Installation
 
-Add the following line to your `Cargo.toml` file's dependencies section:
+Install [podcast-api from crates.io](https://crates.io/crates/podcast-api). Add the following line to your `Cargo.toml` file's dependencies section:
 
 ```toml
 [dependencies]