Delay CI cache restore until the toolchain has been installed. (#40) #106

Job	Run time
cargo clippy (wasm32)	2m 14s
cargo test (windows-latest)	5m 38s
formatting	23s
cargo test (macos-latest)	1m 47s
cargo test (ubuntu-latest)	3m 11s
cargo check (msrv) (windows-latest)	4m 12s
cargo check (msrv) (wasm32)	1m 10s
cargo check (msrv) (macos-latest)	1m 21s
cargo check (msrv) (ubuntu-latest)	1m 0s
cargo check (aarch64-android)	1m 40s
cargo clippy (windows-latest)	5m 25s
cargo test (wasm32)	1m 35s
cargo clippy (macos-latest)	1m 47s
cargo doc	1m 20s
cargo clippy (ubuntu-latest)	2m 19s
typos	3s
	35m 5s

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