doc: fix typographical error

Insert missing word.

PR-URL: #30735
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Gireesh Punathil <[email protected]>
Reviewed-By: Trivikram Kamat <[email protected]>
Reviewed-By: Colin Ihrig <[email protected]>
Reviewed-By: Luigi Pinca <[email protected]>
Reviewed-By: Tobias Nießen <[email protected]>
Reviewed-By: Ruben Bridgewater <[email protected]>
Reviewed-By: James M Snell <[email protected]>

Author: Trott

doc/api/perf_hooks.md

@@ -547,7 +547,7 @@ The standard deviation of the recorded event loop delays.
 ### Measuring the duration of async operations
 
 The following example uses the [Async Hooks][] and Performance APIs to measure
-the actual duration of a Timeout operation (including the amount of time it
+the actual duration of a Timeout operation (including the amount of time it took
 to execute the callback).
 
 ```js