build(deps): bump Externals/sse2neon from `1a854ed` to `29716df` #4954

Job	Run time
FreeBSD Debug x86_64	6m 49s
Windows Debug x64 (msvc)	35m 12s
FreeBSD Release x86_64	9m 17s
Ubuntu Debug amd64 (gcc)	6m 21s
Windows Debug x86 (msvc)	5m 34s
OpenBSD Debug x86_64	10m 48s
Ubuntu Release amd64 (gcc)	6m 15s
Windows Mixed x64 (msvc)	5m 9s
OpenBSD Release x86_64	9m 4s
Windows Mixed x86 (msvc)	5m 49s
Ubuntu Debug amd64 (clang)	6m 47s
NetBSD Debug x86_64	10m 5s
Windows Release x64 (msvc)	10m 23s
Ubuntu Release amd64 (clang)	10m 10s
NetBSD Release x86_64	8m 52s
Windows Release x86 (msvc)	9m 19s
Alpine Debug x86_64 (gcc)	7m 33s
Windows Release Master Gold x64 (msvc)	9m 32s
Alpine Release x86_64 (gcc)	8m 43s
Windows Release Master Gold x86 (msvc)	8m 26s
Alpine Debug x86 (gcc)	7m 22s
Alpine Release x86 (gcc)	9m 49s
Fedora Debug x86_64 (gcc)	19m 13s
Fedora Release x86_64 (gcc)	16m 5s
macOS Debug x86_64 (clang)	8m 25s
macOS Release x86_64 (clang)	13m 23s
macOS Debug arm64 (clang)	5m 13s
macOS Release arm64 (clang)	6m 12s
	4h 35m 50s

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