Update resultdb_version to git_revision:ac21cf9883af7d1bf6d60e8a7448918eb3b6aa18

Change-Id: I106b9fbe779c092e44db0c98e0a646633fccf8d2
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/103616
Auto-Submit: K. Moon <kmoon@chromium.org>
Reviewed-by: Nigi <nigi@chromium.org>
Commit-Queue: Nigi <nigi@chromium.org>
diff --git a/DEPS b/DEPS
index 46f8f2d..a382e58 100644
--- a/DEPS
+++ b/DEPS
@@ -144,7 +144,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling resultdb
   # and whatever else without interference from each other.
-  'resultdb_version': 'git_revision:39e20ee396fe4a84eaa7f7d389e5659198c12e87',
+  'resultdb_version': 'git_revision:ac21cf9883af7d1bf6d60e8a7448918eb3b6aa18',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling skia
   # and whatever else without interference from each other.