Revert clang-format to 18 #1562

Job	Run time
Set up and cache emscripten	14s
Copy the font files	5s
Build ubuntu-20.04-g++-10	5m 25s
Build ubuntu-22.04-g++-11	4m 56s
Build ubuntu-22.04-g++-12	5m 42s
Build ubuntu-20.04-clang-10	5m 48s
Build ubuntu-20.04-clang-11	5m 27s
Build ubuntu-20.04-clang-12	5m 37s
Build macos-latest-xcode-14.3	2m 58s
Build macos-latest-xcode-15.3	3m 22s
Build macos-latest-g++-12	7m 12s
Build JS toolkit (nohumdrum, Building toolkit without humdrum, -c -H -M, verovio-toolkit.js*)	6m 35s
Build JS toolkit (light, Building toolkit without humdrum as light version, -c -H -l -M, verovio-...	6m 47s
Build JS toolkit (wasm, Building toolkit without humdrum as wasm, -c -H -w -M, veroviowasm, true)	5m 51s
Build JS toolkit (default, Building default toolkit with humdrum, -c -M, -hum.js)	9m 1s
Check settings for deployment	1s
Build documentation	2m 17s
Deploy JS toolkit	1m 12s
Deploy documentation	37s
Skip deployment if set	0s
	1h 19m 7s

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