github actions: update recommended Rust to 1.74.1 #1998

Job	Run time
checks_with_udev (RUST_LOG=stratisd=debug make -f Makefile test-loop, 1.74.1, cargo)	13m 10s
checks (make -f Makefile clippy, 1.74.1, clippy)	2m 6s
checks (PROFILEDIR=debug make -f Makefile build, 1.74.1, cargo)	1m 46s
checks (PROFILEDIR=debug make -f Makefile build-min, 1.74.1, cargo)	1m 43s
checks (PROFILEDIR=debug make -f Makefile build-no-ipc, 1.74.1, cargo)	1m 53s
checks (PROFILEDIR=debug make -f Makefile stratis-dumpmetadata, 1.74.1, cargo)	1m 36s
checks (make -f Makefile docs-ci, 1.74.1, cargo)	1m 35s
checks (make -f Makefile test, 1.74.1, cargo)	2m 27s
checks (TANG_URL=localhost make -f Makefile test-clevis-loop-should-fail, 1.74.1, cargo)	2m 6s
checks (make -f Makefile build, 1.74.1, cargo)	3m 32s
checks (make -f Makefile build-min, 1.74.1, cargo)	2m 8s
checks (make -f Makefile build-no-ipc, 1.74.1, cargo)	2m 30s
	36m 32s

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