fix wrong default value for value_factor in README.md

[schmocker]

the default value for the parameter value_factor is documented as 0. But I think it should be 1.

[ildar170975]

This is not correct.
The value of value_factor is used here:

mini-graph-card/src/main.js

Line 695 in 210fb4c

const value_factor = 10 ** this.config.value_factor;

i.e. 0 value gives 1.

[ildar170975]

@schmocker
Do not get disappointed & keep improving the mini-graph-card ))

[schmocker]

@ildar170975 oh ok I see, you are correct. Well that it's even more confusing since this is not a 'factor' but actually an 'exponent' which together with base 10 builds the actual factor. I would recommend to let the users define the factors directly (not the exponent) or rename it into something like value_factor_exponent and explain it a bit better.

[ildar170975]

I would recommend to let the users define the factors directly (not the exponent) or rename it into something like value_factor_exponent and explain it a bit better.

You are right, could be confusing. Check #591