src: fix typo in node_mutex · nodejs/node@629e72e

Original file line number	Diff line number	Diff line change
`@@ -32,7 +32,7 @@ class ExclusiveAccess {`
`32`	`32`
`33`	`33`	`class Scoped {`
`34`	`34`	`public:`
`35`		`-// ExclusiveAccess will commonly be used in conjuction with std::shared_ptr`
	`35`	`+// ExclusiveAccess will commonly be used in conjunction with std::shared_ptr`
`36`	`36`	`// and without this constructor it's too easy to forget to keep a reference`
`37`	`37`	`// around to the shared_ptr while operating on the ExclusiveAccess object.`
`38`	`38`	`explicit Scoped(const std::shared_ptr<ExclusiveAccess>& shared)`