Build

Bump Externals/imgui from `1820fe5` to `8679cfa` #5307

Job	Run time
FreeBSD Debug x86_64	2m 22s
FreeBSD Release x86_64	2m 22s
OpenBSD Debug x86_64	4m 30s
OpenBSD Release x86_64	4m 41s
NetBSD Debug x86_64	3m 36s
NetBSD Release x86_64	3m 20s
Windows Debug x64 (msvc)	2m 58s
Ubuntu Debug amd64 (gcc)	3m 28s
Windows Debug x86 (msvc)	3m 8s
Ubuntu Release amd64 (gcc)	1m 44s
Windows Mixed x64 (msvc)	3m 8s
Ubuntu Debug amd64 (clang)	2m 13s
Ubuntu Release amd64 (clang)	1m 51s
Windows Mixed x86 (msvc)	3m 2s
Ubuntu Debug arm64 (gcc)	2m 39s
Windows Release x64 (msvc)	3m 51s
Ubuntu Release arm64 (gcc)	1m 59s
Windows Release x86 (msvc)	3m 17s
Alpine Debug x86_64 (gcc)	1m 58s
Windows Release Master Gold x64 (msvc)	3m 10s
Alpine Release x86_64 (gcc)	2m 20s
Windows Release Master Gold x86 (msvc)	2m 25s
Alpine Debug x86 (gcc)	1m 55s
Alpine Release x86 (gcc)	1m 50s
Fedora Debug x86_64 (gcc)	2m 20s
Fedora Release x86_64 (gcc)	1m 54s
macOS 13 Debug x86_64 (clang)	3m 16s
macOS 13 Release x86_64 (clang)	3m 44s
macOS 15 Debug arm64 (clang)	2m 10s
macOS 15 Release arm64 (clang)	1m 26s
	1h 22m 37s

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