Delay CI cache restore until the toolchain has been installed. #1727

Job	Run time
cargo check (msrv) (windows-latest)	3m 28s
cargo check (msrv) (wasm32)	1m 24s
cargo check (msrv) (macos-latest)	1m 22s
cargo check (aarch64-android)	1m 38s
cargo clippy (windows-latest)	8m 27s
cargo check (msrv) (ubuntu-latest)	2m 17s
cargo clippy (macos-latest)	3m 28s
cargo clippy (wasm32)	3m 8s
cargo doc	1m 43s
cargo clippy (ubuntu-latest)	4m 0s
formatting	26s
Prime LFS Cache	10s
cargo test (wasm32)	1m 28s
typos	9s
cargo test (windows-latest)	5m 44s
cargo test (macos-latest)	3m 40s
cargo test (ubuntu-latest)	5m 30s
	48m 2s

Provide feedback