timers: clarify lib/timer.js comment

timers: clarify lib/timer.js comment · nodejs/node@f49feab

Original file line number	Diff line number	Diff line change
`@@ -72,7 +72,7 @@ const TIMEOUT_MAX = 2147483647; // 2^31-1`
`72`	`72`	`// timeout later, thus only needing to be appended.`
`73`	`73`	`// Removal from an object-property linked list is also virtually constant-time`
`74`	`74`	`// as can be seen in the lib/internal/linkedlist.js implementation.`
`75`		`-// Timeouts only need to process any timers due to currently timeout, which will`
	`75`	`+// Timeouts only need to process any timers currently due to expire, which will`
`76`	`76`	`// always be at the beginning of the list for reasons stated above. Any timers`
`77`	`77`	`// after the first one encountered that does not yet need to timeout will also`
`78`	`78`	`// always be due to timeout at a later time.`