aria

ci: bump actions/checkout to v6 (#545) #389

Job	Run time
test (1.85.0)	22s
test (stable)	23s
build (1.85.0, thumbv7em-none-eabi)	16s
build (stable, wasm32-unknown-unknown)	18s
build (1.85.0, wasm32-unknown-unknown)	16s
build (stable, thumbv7em-none-eabi)	19s
minimal-versions / minimal-versions	31s
	2m 25s

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