Fix CardinalMini modgui class name #1636

Job	Run time
headless	44m 46s
lto	43m 12s
linux-x86_64-debug	1h 6m 16s
macos (universal-10.15)	2h 3m 5s
linux (aarch64)	32m 7s
linux (armhf)	26m 47s
plugin-validation	1h 34m 39s
modaudio (modduo, modduo-static, MODDUO=true)	54m 16s
source-tarball	19m 2s
linux (i386)	25m 36s
modaudio (modduox, modduox-static)	43m 13s
sysdeps	43m 26s
linux (riscv64)	28m 36s
modaudio (moddwarf, moddwarf)	50m 38s
linux (x86_64)	26m 46s
wasm (simd)	1h 25m 34s
windows (win32)	36m 10s
wasm (nosimd)	1h 17m 28s
windows (win64)	38m 35s
	16h 0m 12s

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