chore: /quic → /quic-v1 in examples

[lidel]

Fixing some leftovers, I've seen people on forums still following outdated nat configuration tutorial.

Ref.

• https://github.com/libp2p/go-libp2p/issues/2369
• https://discuss.ipfs.tech/t/getting-a-public-ip-behind-nat/18212/3?u=lidel