Add Void with musl to Docker CI #25

Job	Run time
android / Generate Godot API	55s
windows / MSVS 2022 on Windows CMake	5m 15s
lint-py-focs / lint-py-focs	38s
lint-python / lint	20s
docker / ubuntu-23.04	5m 35s
code-ql / Analyze (cpp)	5m 29s
docker / fedora-33	5m 43s
lint-python / tests (3.9)	24s
docker / debian-oldstable	6m 33s
snapcraft / snapcraft	5m 14s
lint-python / tests (3.10)	14s
docker / debian-stable	6m 8s
ubuntu / ubuntu-22.04 with gcc	5m 25s
docker / debian-sid	6m 33s
docker / debian-sid-i386	6m 25s
ubuntu / ubuntu-22.04 with clang	5m 24s
windows-msvc / MSVS 2022 on Windows	5m 11s
docker / manjaro	6m 30s
docker / fedora-rawhide	5m 55s
docker / void-musl	23s
lint-string-tables / lint-string-tables (3.9)	9s
macos (macos-12) / macos-12	3m 51s
macos (macos-13) / macos-13	3m 51s
android / x86	3m 34s
android / x86_64	1s
android / armeabi-v7a	3m 29s
android / arm64-v8a	3m 47s
	1h 42m 56s

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