message: tracing: fix tiny typo
diff: //!
  //! // the `#[tracing::instrument]` attribute creates and enters a span
  //! // every time the instrumented function is called. The span is named after the
  -//! // the function or method. Paramaters passed to the function are recorded as fields.
  +//! // the function or method. Parameters passed to the function are recorded as fields.
  //! #[tracing::instrument]
  //! pub fn shave(yak: usize) -> Result<(), Box<dyn Error + 'static>> {
  //! // this creates an event at the DEBUG level with two fields:
  