update libwebp to 1.2.3

https://chromium.googlesource.com/webm/libwebp/+log/20ef03e..v1.2.3

- 6/30/2022: version 1.2.3
  This is a binary compatible release.
  * security fix for lossless encoder (#565, chromium:1313709)
  * improved progress granularity in WebPReportProgress() when using lossless
  * improved precision in Sharp YUV (-sharp_yuv) conversion
  * many corrections to webp-lossless-bitstream-spec.txt (#551)
  * crash/leak fixes on error/OOM and other bug fixes (#558, #563, #569, #573)

Bug: b:230421671
Bug: webp:568
Change-Id: I27abf2a414ae55ecb43fdbda9d27194476f0ad70
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/557197
Reviewed-by: Leon Scroggins <scroggo@google.com>
Commit-Queue: Leon Scroggins <scroggo@google.com>
2 files changed