Update V8 to version 9.3.96.

Summary of changes available at:
https://chromium.googlesource.com/v8/v8/+log/af15eb6d..3df8cdab

Please follow these instructions for assigning/CC'ing issues:
https://v8.dev/docs/triage-issues

Please close rolling in case of a roll revert:
https://v8-roll.appspot.com/
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R=hablich@chromium.org,vahl@chromium.org,v8-waterfall-sheriff@grotations.appspotmail.com

Change-Id: Ie1a7c8c95e64b6b6d06d6b49d53760d0ca993e26
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2948175
Bot-Commit: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Commit-Queue: v8-ci-autoroll-builder <v8-ci-autoroll-builder@chops-service-accounts.iam.gserviceaccount.com>
Cr-Commit-Position: refs/heads/master@{#890712}
diff --git a/DEPS b/DEPS
index 6efcd401..4e23837 100644
--- a/DEPS
+++ b/DEPS
@@ -213,7 +213,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling V8
   # and whatever else without interference from each other.
-  'v8_revision': 'af15eb6d279ba131bae39042483a53c3d93d4166',
+  'v8_revision': '3df8cdabaf9648ea9cea61f2498647fdb4cc8dfd',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling swarming_client
   # and whatever else without interference from each other.