docs: use Libp2p.create() in examples (#811)

[a1300]

I didn't changed the use of new Libp2p() in the examples/delegated-routing directory because this is already in progress in PR #507

js-libp2p/examples/delegated-routing/src/libp2p-bundle.js

Lines 23 to 30 in d0a9fad

	return new Libp2p({
	peerInfo,
	peerBook,
	// Lets limit the connection managers peers and have it check peer health less frequently
	connectionManager: {
	maxPeers: 10,
	pollInterval: 5000
	},

[vasco-santos]

Thanks for the PR. Except for my two comments in the API doc, everything looks good

[vasco-santos]

LGTM