doc: use "Calls" over "Executes" for consistency

doc: use "Calls" over "Executes" for consistency · nodejs/node@cd1297f

Original file line number	Diff line number	Diff line change
`@@ -132,7 +132,7 @@ Returns a copy of the array of listeners for the specified event.`
`132`	`132`
`133`	`133`	`### emitter.emit(event[, arg1][, arg2][, ...])`
`134`	`134`
`135`		`-Executes each of the listeners in order with the supplied arguments.`
	`135`	`+Calls each of the listeners in order with the supplied arguments.`
`136`	`136`
`137`	`137`	Returns `true` if event had listeners, `false` otherwise.
`138`	`138`