minor doc comment fix in lib.rs
As seen in
The decode/encode code samples both do not have a closing set of backticks. This adds them.
//! .as_any()
//! .downcast_ref::<Goodbye>(){}
//! ....
-//!
+//!```
//!
//! Encoding RTCP packets:
//!```nobuild
//!
//! let pli_data = pkt.marshal().unwrap();
//! // ...
+//!```
pub mod compound_packet;
mod error;
