Add Revision field to third_party/NotoSansCJK/README.pdfium

Per software BOM best practices.

Bug: 347862221
Change-Id: Ifd9f0cdb3d43d5aa32eb4cc615fe113754ff6435
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/120770
Reviewed-by: Thomas Sepez <tsepez@google.com>
Commit-Queue: Lei Zhang <thestig@chromium.org>
diff --git a/third_party/NotoSansCJK/README.pdfium b/third_party/NotoSansCJK/README.pdfium
index 5c8ba5a..0c032a4 100644
--- a/third_party/NotoSansCJK/README.pdfium
+++ b/third_party/NotoSansCJK/README.pdfium
@@ -1,6 +1,7 @@
 Name: Noto Sans CJK Font
 URL: https://github.com/googlefonts/noto-cjk
 Version: Noto Sans CJK V2.001
+Revision: cf29231ab8029678af4bbc1a9480e2b296a5b2d3
 License: SIL Open Font License v1.1
 License File: LICENSE
 Security Critical: no