doc: update print results(detail) in PerformanceEntry

PR-URL: nodejs#50723
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Deokjin Kim <deokjin81.kim@gmail.com>

Author: Jungku Lee

doc/api/perf_hooks.md

@@ -1328,13 +1328,15 @@ const obs = new PerformanceObserver((perfObserverList, observer) => {
    *     name: 'test',
    *     entryType: 'mark',
    *     startTime: 81.465639,
-   *     duration: 0
+   *     duration: 0,
+   *     detail: null
    *   },
    *   PerformanceEntry {
    *     name: 'meow',
    *     entryType: 'mark',
    *     startTime: 81.860064,
-   *     duration: 0
+   *     duration: 0,
+   *     detail: null
    *   }
    * ]
    */
@@ -1378,7 +1380,8 @@ const obs = new PerformanceObserver((perfObserverList, observer) => {
    *     name: 'meow',
    *     entryType: 'mark',
    *     startTime: 98.545991,
-   *     duration: 0
+   *     duration: 0,
+   *     detail: null
    *   }
    * ]
    */
@@ -1391,7 +1394,8 @@ const obs = new PerformanceObserver((perfObserverList, observer) => {
    *     name: 'test',
    *     entryType: 'mark',
    *     startTime: 63.518931,
-   *     duration: 0
+   *     duration: 0,
+   *     detail: null
    *   }
    * ]
    */
@@ -1434,13 +1438,15 @@ const obs = new PerformanceObserver((perfObserverList, observer) => {
    *     name: 'test',
    *     entryType: 'mark',
    *     startTime: 55.897834,
-   *     duration: 0
+   *     duration: 0,
+   *     detail: null
    *   },
    *   PerformanceEntry {
    *     name: 'meow',
    *     entryType: 'mark',
    *     startTime: 56.350146,
-   *     duration: 0
+   *     duration: 0,
+   *     detail: null
    *   }
    * ]
    */