[cimg] update to 3.6.4

[toge]

• Changes comply with the maintainer guide.
• SHA512s are updated for each updated download.
• The "supports" clause reflects platforms that may be fixed by this new version.
• Any fixed CI baseline entries are removed from that file.
• Any patches that are no longer applied are deleted from the port's directory.
• The version database is fixed by rerunning ./vcpkg x-add-version --all and committing the result.
• Only one version is added to each modified port's versions file.

https://github.com/GreycLab/CImg/releases/tag/v.3.6.4

[toge]

GNOME-atk-2.38.0.tar.gz.11572.part: error: download from https://gitlab.gnome.org//GNOME/atk/-/archive/2.38.0/atk-2.38.0.tar.gz had an unexpected hash
note: Expected: f31951ecbdace6a18fb9f772616137cb8732163b37448fef4daf1af60ba8479c94d498dcdaf4880468c80012c77a446da585926a99704a9a940b80e546080cf3
note: Actual  : 5e7c1d3a27d7d3516af4398da3e4759e15e9ed8252484c0ef6f97298a4b40e3e07f92e7f8e9f8510edc5110dc03e6b486e4f8ad19d6adbfa309a7da0430e3b2e

[vicroms]

/azp run

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).