[Fix] Docs: Correct pinout for Shrike-lite (#16)

Maps Shrike-lite pinout as per RP2040

     SPI0 CSn | UART1 RX | I2C0 SCL  <- IO5  ◦      ◦ IO29 -> SPI1 CSn | UART0 RX | I2C0 SCL
     SPI0 SCK |          | I2C1 SDA  <- IO6  ◦      ◦ IO28 -> SPI1 RX  | UART0 TX | I2C0 SDA
     SPI0 TX  |          | I2C1 SCL  <- IO7  ◦      ◦ IO27 -> SPI1 TX  |          | I2C1 SCL
     SPI1 RX  | UART1 TX | I2C0 SDA  <- IO8  ◦      ◦ IO26 -> SPI1 SCK |          | I2C1 SDA
     SPI1 CSn | UART1 RX | I2C0 SCL  <- IO9  ◦      ◦ GND
                                        GND  ◦      ◦ IO25 -> SPI1 CSn | UART1 RX | I2C0 SCL
     SPI1 SCK |          | I2C1 SDA  <- IO10 ◦      ◦ IO24 -> SPI1 RX  | UART1 TX | I2C0 SDA
     SPI1 TX  |          | I2C1 SCL  <- IO11 ◦      ◦ IO23 -> SPI0 TX  |          | I2C1 SCL
     SPI1 SCK |          | I2C1 SDA  <- IO14 ◦      ◦ IO22 -> SPI0 SCK |          | I2C1 SDA
     SPI1 TX  |          | I2C1 SCL  <- IO15 ◦      ◦ IO21 -> SPI0 CSn | UART1 RX | I2C0 SCL
                                        GND  ◦      ◦ GND
                                             ◦      ◦ IO20 -> SPI0 RX  | UART1 TX | I2C0 SDA
                                             ◦      ◦ IO19 -> SPI0 TX  |          | I2C1 SCL
                                             ◦      ◦ IO18 -> SPI0 SCK |          | I2C1 SDA
                                             ◦      ◦ IO17 -> SPI0 CSn | UART0 RX | I2C0 SCL
                                             ◦      ◦ IO16 -> SPI0 RX  | UART0 TX | I2C0 SDA
                                             ◦      ◦ GND

Signed-off-by: Shail Parmar <shailparmar26@gmail.com>

Author: shailparmar03