Nodebestpractices: Polish flag in the homepage

[goldbergyoni]

@mbiesiad Did we forget to add Polish flag to homepage?

[mbiesiad]

@goldbergyoni Good question. Here #631 : https://github.com/goldbergyoni/nodebestpractices/pull/631#issuecomment-606041471 is more info about this. And there is also a snippet for paste. The flag is added to the assets https://github.com/goldbergyoni/nodebestpractices/tree/master/assets/flags and used at the "Completed translations" section (at the end)

[kevynb]

Would you mind creating a PR to add it at the top of the homepage like for 🇨🇳 , 🇧🇷 , 🇷🇺 ?

[mbiesiad]

Sure, done: #677 -> changes here

// if the problem occurs again, I will try with the https://emojipedia.org/flag-poland/

[kevynb]

Great, thanks @mbiesiad!