UartRx's read_byte should be public

[nan-mu]

At uart.rs, line 466, this function should be public:

impl<'d, T, M> UartRx<'d, T, M>
where
    T: Instance,
    M: Mode,
{
    pub fn read_byte(&mut self) -> nb::Result<u8, Error> {
        // On the ESP32-S2 we need to use PeriBus2 to read the FIFO:
        let offset = if cfg!(esp32s2) { 0x20C00000 } else { 0 };

        if T::get_rx_fifo_count() > 0 {
            let value = unsafe {
                let fifo = (T::register_block().fifo().as_ptr() as *mut u8).offset(offset)
                    as *mut crate::peripherals::generic::Reg<FIFO_SPEC>;
                (*fifo).read().rxfifo_rd_byte().bits()
            };

            Ok(value)
        } else {
            Err(nb::Error::WouldBlock)
        }
    }
}

Or you should change the document for uart.rs at line 44:

//! ### Examples
//!
//! #### Sending and Receiving Data
//!
//! ```no_run
//! // Write bytes out over the UART:
//! uart1.write_bytes("Hello, world!".as_bytes())?;
//! ```
//!
//! #### Splitting the UART into TX and RX Components
//!
//! ```no_run
//! // The UART can be split into separate Transmit and Receive components:
//! let (mut tx, rx) = uart1.split();
//!
//! // Each component can be used individually to interact with the UART:
//! tx.write_bytes(&[42u8])?;
//! let byte = rx.read_byte()?;
//! ```

just a tiny fix so I have given a pr, you can accept or fix with other change