test_runner: fix duration_ms to be milliseconds

PR-URL: nodejs/node#44450
Reviewed-By: Benjamin Gruenbaum <[email protected]>
Reviewed-By: Antoine du Hamel <[email protected]>
Reviewed-By: Franziska Hinkelmann <[email protected]>
Reviewed-By: Rich Trott <[email protected]>
Reviewed-By: Minwoo Jung <[email protected]>
(cherry picked from commit 6ee1f3444f8c1cf005153f936ffc74221d55658b)

Author: MoLow

lib/internal/test_runner/test.js

@@ -1,4 +1,4 @@
-// https://github.com/nodejs/node/blob/59527de13d39327eb3dfa8dedc92241eb40066d5/lib/internal/test_runner/test.js
+// https://github.com/nodejs/node/blob/6ee1f3444f8c1cf005153f936ffc74221d55658b/lib/internal/test_runner/test.js
 
 'use strict'
 
@@ -617,8 +617,8 @@ class Test extends AsyncResource {
   }
 
   #duration () {
-    // Duration is recorded in BigInt nanoseconds. Convert to seconds.
-    return Number(this.endTime - this.startTime) / 1_000_000_000
+    // Duration is recorded in BigInt nanoseconds. Convert to milliseconds.
+    return Number(this.endTime - this.startTime) / 1_000_000
   }
 
   report () {