Get aarch64 build to run in the before-script-linux step of the matur… #22

Job	Run time
Test cfitsio 3.49 on ubuntu-latest	1m 10s
Test cfitsio 3.49 on macos-13	2m 11s
Test cfitsio 4.5.0 on ubuntu-latest	1m 29s
Test cfitsio 4.5.0 on macos-13	3m 39s
Test cfitsio 3.49 on macos-14	1m 36s
Test cfitsio 4.5.0 on macos-14	1m 32s
Test cfitsio 3.49 on macos-15	1m 14s
Test cfitsio 4.5.0 on macos-15	1m 28s
	14m 19s

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