Update corpus rev

Picks up https://pdfium-review.googlesource.com/c/pdfium_tests/+/138310

Bug: 459840703,42271957
Change-Id: If03a3d373a87b5869314e6addf3cc9c508352901
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/138311
Reviewed-by: Lei Zhang <thestig@chromium.org>
Reviewed-by: Nico Weber <thakis@google.com>
Commit-Queue: Nico Weber <thakis@chromium.org>

DEPS

diff --git a/DEPS b/DEPS
index 9efed13..f37373b 100644
--- a/DEPS
+++ b/DEPS
@@ -196,7 +196,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling pdfium_tests
   # and whatever else without interference from each other.
-  'pdfium_tests_revision': '283c8aba5e69cc9112afedec9c4abd1dddce85f6',
+  'pdfium_tests_revision': '6f3bba0789bd0e60f1e42cb5604ad367197fdca6',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling result_adapter_revision
   # and whatever else without interference from each other.