Update MK8 Cluster Fuel Resistor Requirements

[cottinghamd]

The current instructions request a 180ohm resistor connection to display full fuel. However an 180ohm resistor displays empty on the cluster.

This is an update to the Focus MK8 Cluster readme to clarify that a 10ohm resistor is required for full fuel. This was identified through digging through the xconnect discord and functional testing

[InfoX1337]

Afaik there are different requirements for EU versions and US versions due to local regulations, therefore different resistors have to be used on different region clusters. See: https://kus-usa.com/resources/american-vs-european-standard-signal-output/

[cottinghamd]

Ah I wasn't aware of that. My cluster was sourced from the United Kingdom and my pull request is what I found worked on that cluster. I agree it's hard to provide guidance if there isn't a universal standard.

Perhaps updating the readme to say something like:

Connect a resistor between pins 2 & 10 to modify the fuel value shown on the gauge cluster.

The resistor required to display full fuel may vary depending on the geographical region your gauge cluster was manufactured for. Success has been reported by using either a 10 ohm or 180 ohm resistor, however other resistance values may also be required.

The only reason I'm suggesting the update is I spent quite a few hours trying to get the 180ohm resistor to work, with no success.