pea-sys
I found a similar Issue https://github.com/dotnet/sdk/issues/24747
@mingrammer I used a simple tool. https://github.com/pea-sys/ZopfliPng-GUI I can optimize other images as well, do you mind if I use other PR?
I created this tool for non-developers. I agree that it is not very convenient for developers. It takes a long time to optimize all images. It would seem that the...
It is fixed in the following commit b7a7260f4ad034517d14d636ca3d7fbb9ac2429a
I used zopfli with no options and reduced the image size. I used WinMerge when checking the image loss less 
@Jay-o-Way For example, reduced package and document download times and bandwidth usage. The appearance of the images has not been changed, so there is no disadvantage.
@Jay-o-Way ■Total png file size [Before] 314 Items 11,781,077 byte [After] 314 Items 8,197,113 byte ※Reduce the size of the entire repository by about 1%.
@jaimecbernardo Thanks for your review.
サクラエディタをコンパイルするために、Visual Studio Community 2019をダウンロードしようと思いましたが 現在はダウンロードできなくなっていそうです。VisualStudioのバージョンアップに賛成します。 