Roll third_party/libpng/ 20d2554f8..805df541c (1 commit)

https://chromium.googlesource.com/chromium/src/third_party/libpng.git/+log/20d2554f81db..805df541c440

Created with:
  roll-dep third_party/libpng

Change-Id: I62afe2d120aca9b6b956c2483b6d4b5f40337c18
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/105810
Reviewed-by: Nigi <nigi@chromium.org>
Commit-Queue: Nigi <nigi@chromium.org>
Auto-Submit: Andy Phan <andyphan@chromium.org>
diff --git a/DEPS b/DEPS
index 0750199..9ea416a 100644
--- a/DEPS
+++ b/DEPS
@@ -112,7 +112,7 @@
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libpng
   # and whatever else without interference from each other.
-  'libpng_revision': '20d2554f81dbe5994d7ee11e3744a47cf8d71d34',
+  'libpng_revision': '805df541c44099bb20d425ac47c666e29b1f7a80',
   # Three lines of non-changing comments so that
   # the commit queue can handle CLs rolling libunwind
   # and whatever else without interference from each other.