Broken link to awesome-substrate

[ltfschoen]

Broken Link

https://github.com/spolkadot-developers/awesome-substrate/blob/master/README.md

Expected Location

https://github.com/polkadot-developers/awesome-substrate/blob/master/README.md

Context and Origin

It was found by clicking a link, the link has an unnecessary letter "s" in it that breaks it (i.e. "spolkadot" instead of "polkadot")