Use `actions/checkout@v4` and `actions-rust-lang/setup-rust-toolchain@v1`. #1649

Job	Run time
Run tests (1.70, false)	1m 47s
Build binary (Windows)	1m 32s
Build binary	44s
Run tests (1.71, false)	1m 45s
Check lint and rustfmt	28s
Run tests (1.72, false)	1m 45s
Run tests (stable, false)	1m 37s
Run tests (beta, false)	1m 44s
Check if version changed	23s
Semver: core-graphics	1m 38s
Run tests (nightly, true)	1m 45s
Caching across rustdoc versions	43s
Caching with feature config changed	42s
Semver: libp2p-uds 0.37.0	57s
Semver: libp2p-dcutr 1.62.0 and libp2p-relay 0.14.0	53s
Semver: libp2p-core 0.37.0	56s
Semver: bevy_core v0.9.0	54s
Semver: libp2p-gossipsub ~0.44.0 + libp2p-request-response ~0.24.0	54s
Semver: bevy_gltf v0.9.1	56s
Semver: clap v3.2.0	52s
Semver: sqllogictest v0.13.0	56s
Semver: ref-slice fork (git)	53s
Semver: tokio ~v1.25.0 (explicit)	23s
Semver: ref-slice fork (sparse)	23s
Semver: tokio ~v1.25.0 (implicit)	1s
Check failure when installed rustc is too old	1s
Semver: perf-event-open-sys2 v5.0.0	1s
Semver: ref-slice fork (Windows)	1s
All CI stages	1s
Check for semver compliance	1s
Run the release workflow	1s
	25m 37s

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