Change triggers for rust fmt workflow #592

Job	Run time
test-juliaup (x86_64-pc-windows-msvc)	4m 38s
test-juliaup (x86_64-pc-windows-gnu)	4m 40s
test-juliaup (x86_64-apple-darwin)	4m 37s
test-juliaup (x86_64-unknown-linux-gnu)	4m 42s
test-juliaup (x86_64-unknown-linux-musl)	4m 43s
test-juliaup (i686-pc-windows-msvc)	4m 41s
test-juliaup (i686-pc-windows-gnu)	4m 39s
check-juliaup (x86_64-pc-windows-msvc-windowsstore)	2m 42s
check-juliaup (x86_64-pc-windows-msvc-windowsappinstaller)	3m 16s
check-juliaup (x86_64-pc-windows-gnu-msi)	3m 17s
check-juliaup (x86_64-pc-windows-gnu-msi)	3m 42s
check-juliaup (x86_64-apple-darwin)	2m 34s
check-juliaup (x86_64-unknown-linux-gnu)	3m 4s
check-juliaup (x86_64-unknown-linux-musl)	2m 37s
check-juliaup (i686-pc-windows-msvc-windowsstore)	3m 8s
check-juliaup (i686-pc-windows-msvc-windowsappinstaller)	3m 56s
check-juliaup (i686-pc-windows-gnu-msi)	2m 41s
check-juliaup (i686-unknown-linux-gnu)	2m 26s
check-juliaup (i686-unknown-linux-musl)	2m 47s
check-juliaup (aarch64-unknown-linux-gnu)	3m 13s
check-juliaup (aarch64-unknown-linux-musl)	2m 33s
check-juliaup (aarch64-apple-darwin)	1m 51s
	1h 16m 27s

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