The UARTs should really have their UART number by them

[factoidforrest]

The various optionally enabled uarts onboard go to specific pins. This is sort of a newer thing since the pi4. Each should have its uart number instead of just "rx" or "tx" by them in the overlay. Here's a handy table.

UART	TX GPIO	RX GPIO	TX Pin	RX Pin
UART0	GPIO 14	GPIO 15	Pin 8	Pin 10
UART1	GPIO 0	GPIO 1	Pin 27	Pin 28
UART2	GPIO 4	GPIO 5	Pin 7	Pin 29
UART3	GPIO 8	GPIO 9	Pin 24	Pin 21
UART4	GPIO 12	GPIO 13	Pin 32	Pin 33

I'd be happy to fix this if I knew a PR would be considered! Thanks