Merge pull request #2933 from Rnbsov/patch-19

fix units

Author: iliakan

7-animation/3-js-animation/article.md

@@ -96,7 +96,7 @@ The returned value `requestId` can be used to cancel the call:
 cancelAnimationFrame(requestId);
 ```
 
-The `callback` gets one argument -- the time passed from the beginning of the page load in microseconds. This time can also be obtained by calling [performance.now()](mdn:api/Performance/now).
+The `callback` gets one argument -- the time passed from the beginning of the page load in milliseconds. This time can also be obtained by calling [performance.now()](mdn:api/Performance/now).
 
 Usually `callback` runs very soon, unless the CPU is overloaded or the laptop battery is almost discharged, or there's another reason.