Roll third_party/icu/ c9fb4b3a6..4c8cc4b36 (2 commits)

https://chromium.googlesource.com/chromium/deps/icu.git/+log/c9fb4b3a6fb5..4c8cc4b365a5

Created with:
  roll-dep third_party/icu

Change-Id: I65821ce6728c992777b4a9795e3da6b8a12ff932
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/131456
Auto-Submit: Andy Phan <andyphan@chromium.org>
Commit-Queue: Lei Zhang <thestig@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>
diff --git a/DEPS b/DEPS
index f798976..2e64762 100644
--- a/DEPS
+++ b/DEPS
@@ -138,7 +138,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling icu
   # and whatever else without interference from each other.
-  'icu_revision': 'c9fb4b3a6fb54aa8c20a03bbcaa0a4a985ffd34b',
+  'icu_revision': '4c8cc4b365a505ce35be1e0bd488476c5f79805d',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling instrumented_lib
   # and whatever else without interference from each other.