busio.UART does not handle CTS pin without RTS pin

[rottaran]

circuitpython/ports/espressif/common-hal/busio/UART.c

Lines 141 to 144 in cccfdc0

	} else if (have_rts) {
	uart_config.flow_ctrl = UART_HW_FLOWCTRL_RTS;
	} else if (have_rts) {
	uart_config.flow_ctrl = UART_HW_FLOWCTRL_CTS;

there is a typo in the second if-statement. It should be have_cts