chore(src/machine/nrf52xxx/adc): update documentation

Signed-off-by: Paul Schroeder <milkpirate@users.noreply.github.com>

Author: milkpirate

src/machine/machine_nrf52xxx.go

@@ -89,8 +89,8 @@ func (a ADC) Configure(config ADCConfig) {
 		// TODO: return an error
 	}
 
-	// Source resistance, according to table 89 on page 364 of the nrf52832 datasheet.
-	// https://infocenter.nordicsemi.com/pdf/nRF52832_PS_v1.4.pdf
+	// Source resistance, according to table 41 on page 676 of the nrf52832 datasheet.
+	// https://docs-be.nordicsemi.com/bundle/ps_nrf52840/attach/nRF52840_PS_v1.11.pdf?_LANG=enus
 	if config.SampleTime <= 3 { // <= 10kΩ
 		configVal |= nrf.SAADC_CH_CONFIG_TACQ_3us << nrf.SAADC_CH_CONFIG_TACQ_Pos
 	} else if config.SampleTime <= 5 { // <= 40kΩ