Revert changes to C++23 #1631

Job	Run time
Copy the font files	4s
Build ubuntu-20.04-g++-10	5m 15s
Set up and cache emscripten	14s
Build ubuntu-22.04-g++-11	5m 4s
Build ubuntu-22.04-g++-12	6m 17s
Build ubuntu-20.04-clang-11	5m 33s
Build ubuntu-22.04-clang-12	6m 9s
Build ubuntu-22.04-clang-12	6m 21s
Build ubuntu-22.04-clang-12	6m 0s
Build ubuntu-22.04-clang-13	5m 46s
Build ubuntu-22.04-clang-14	5m 46s
Build ubuntu-22.04-clang-11	6m 4s
Build ubuntu-22.04-clang-15	6m 1s
Build macos-latest-xcode-15.4	3m 11s
Build macos-latest-g++-12	5m 22s
Build JS toolkit (nohumdrum, Building toolkit without humdrum, -c -H -M, verovio-toolkit.js*)	6m 36s
Build JS toolkit (light, Building toolkit without humdrum as light version, -c -H -l -M, verovio-...	6m 37s
Build JS toolkit (wasm, Building toolkit without humdrum as wasm, -c -H -w -M, veroviowasm, true)	6m 2s
Build JS toolkit (default, Building default toolkit with humdrum, -c -M, -hum.js)	9m 3s
Check settings for deployment	1s
Build documentation	42s
Deploy JS toolkit	1m 19s
Deploy documentation	13s
Skip deployment if set	0s
	1h 43m 40s

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