[meta] update MSRV to 1.72 #3

Job	Run time
Build and test core crates (ubuntu-latest, 1.72)	2m 21s
Cross-compile to aarch64	3m 22s
Build documentation (ubuntu-latest)	52s
Build and test (all features) (ubuntu-latest, 1.72)	3m 27s
Lint	2m 36s
Build and test core crates (ubuntu-latest, stable)	2m 18s
Build and test (all features) (ubuntu-latest, stable)	3m 20s
Build and test core crates (macos-14, 1.72)	2m 6s
Build and test (all features) (macos-14, 1.72)	2m 51s
Build and test core crates (macos-14, stable)	1m 56s
cargo-compare extended tests (ubuntu-latest)	4m 38s
Build and test (all features) (macos-14, stable)	2m 49s
Build and test core crates (windows-latest, 1.72)	5m 25s
Build and test core crates (windows-latest, stable)	7m 19s
Build and test (all features) (windows-latest, 1.72)	7m 33s
Build and test (all features) (windows-latest, stable)	9m 47s
cargo-compare extended tests (macos-14)	3m 40s
	1h 6m 20s

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