message: docs: add missing example for Rotation::MINUTELY
diff: @@ -245,6 +245,14 @@ pub fn never(directory: impl AsRef<Path>, file_name: impl AsRef<Path>) -> Rollin
  ///
  /// To use a `Rotation`, pick one of the following options:
  ///
  +/// ### Minutely Rotation
  +/// ```rust
  +/// # fn docs() {
  +/// use tracing_appender::rolling::Rotation;
  +/// let rotation = tracing_appender::rolling::Rotation::MINUTELY;
  +/// # }
  +/// ```
  +///
  /// ### Hourly Rotation
  /// ```rust
  /// # fn docs() {
  