Bump webdev to 9724fea63ea642cbcf87bb6e43b4076681161a4f

Changes:
```
> git log --format="%C(auto) %h %s" c0492f1..9724fea
 https://dart.googlesource.com/webdev.git/+/9724fea6 Delay edits to work around lack of millisecond precision in `stat` and migrate `pageSource` tests to use console logs (2670)
 https://dart.googlesource.com/webdev.git/+/d0fd3f72 [dwds] Pass reloaded sources path in all hot restart calls in client (2673)
 https://dart.googlesource.com/webdev.git/+/1c291254 [ DWDS ] Disconnect non-DDS clients when DDS connects (2671)
 https://dart.googlesource.com/webdev.git/+/b9473571 [dwds] Fix bug where no-op hot restart doesn't cancel a subscription and publish 25.0.1 (2668)

```

Diff: https://dart.googlesource.com/webdev.git/+/c0492f1b40b591710cd8359d6f142ea6ff315985..9724fea63ea642cbcf87bb6e43b4076681161a4f/
Change-Id: I4bde43b7a4bd9c91021a021e1b16102ac4e6c5b5
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/446986
Reviewed-by: Konstantin Shcheglov <[email protected]>
Auto-Submit: Devon Carew <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: devoncarew

DEPS

@@ -150,7 +150,7 @@ vars = {
   "tools_rev": "1b52e89e0b4ef70e004383c1cf781ad4182f380b",
   "vector_math_rev": "3939545edc38ed657381381d33acde02c49ff827",
   "web_rev": "ee9733fb51ead11d863a00497d721c5b627ac97d",
-  "webdev_rev": "c0492f1b40b591710cd8359d6f142ea6ff315985",
+  "webdev_rev": "9724fea63ea642cbcf87bb6e43b4076681161a4f",
   "webdriver_rev": "595649d890f69b9d05a596426ca93681b1921132",
   "webkit_inspection_protocol_rev": "effa75205516757795683d527c3dea9546eb0c32",