docs: Add example for specifying multiple V8 arguments to node

[alexdulin]

I initially tried to pass options like this:

['--turbo --max_inlined_source_size=700']

which is, in hindsight, clearly wrong. Including in the examples something with two arguments like this would prevent fools like myself from making the same mistake:

['--turbo', '--max_inlined_source_size=700']

[ammarm08]

Good idea, updated readme to show this