Update "Smart Quotes" example to use `“` and `”`

What does this MR do and why?

As I was reading the docs, I came across this line referencing "smart quotes". Based on the example given, I had no idea what a smart quote referred to.

This Microsoft blog, "Smart quotes: The hidden scourge of text meant for computer consumption" indicated they are curly quotes.

So I replaced the quotes in the example to be curly

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