Bump actions/download-artifact from 3 to 4.1.7 in /.github/workflows #964

Job	Run time
Linux Clang - Format check	35s
GCC 13 / LLVM 18 @ Ubuntu Release LLVM source tree	2m 15s
GCC 13 / LLVM 18 @ Ubuntu Release @arm64	6m 48s
GCC 13 / LLVM 18 @ Ubuntu Code Coverage & Debug @arm64	33m 18s
GCC 13 / LLVM 18 @ Ubuntu Code Coverage (libc++) @arm64	44m 36s
GCC 13 / LLVM 18 @ Ubuntu Release @amd64	1m 34s
GCC 13 / LLVM 18 @ Ubuntu Code Coverage & Debug @amd64	3m 5s
GCC 13 / LLVM 18 @ Ubuntu Code Coverage (libc++) @amd64	4m 38s
Clang 18 / LLVM 18 @ macOS Release	3m 10s
Clang 18 / LLVM 18 @ macOS Debug	1m 18s
Clang 18 / LLVM 18 @ macOS Coverage & Debug	3m 18s
Final Deploy	0s
	1h 44m 35s

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