fix: typos in documentation files

[zeevick10]

Corrected similiar to similar
Corrected Curent to Current
Corrected shouldnt to shouldn't
Corrected wont to won't
Corrected doesnt to doesn't x3
Corrected expcted to expected x3
Corrected reciever to receiver x2

[zeevick10]

hi @MarcoPolo! I’ve just submitted a pull request. Could you please review it when you have a chance? I’d appreciate your feedback and any comments. Thank you!

[sukunrt]

I'm closing this. Check https://github.com/libp2p/go-libp2p/issues?q=is%3Aopen+is%3Aissue+label%3A%22help+wanted%22
for more substantial contribution opportunities.