doc: add a note on console stream behavior

doc: add a note on console stream behavior · nodejs/node@c842146

Original file line number	Diff line number	Diff line change
`@@ -19,7 +19,11 @@ The module exports two specific components:`
`19`	`19`
`20`	`20`	`_Warning_: The global console object's methods are neither consistently`
`21`	`21`	`synchronous like the browser APIs they resemble, nor are they consistently`
`22`		`-asynchronous like all other Node.js streams. See the [note on process I/O][] for`
	`22`	`+asynchronous like all other Node.js streams. Programs that desire to depend`
	`23`	`+on the synchronous / asynchronous behavior of the console functions should`
	`24`	`+first figure out the nature of console's backing stream. This is because the`
	`25`	`+stream is dependent on the underlying platform and standard stream`
	`26`	`+configuration of the current process. See the [note on process I/O][] for`
`23`	`27`	`more information.`
`24`	`28`
`25`	`29`	Example using the global `console`: