feat(docs): mention alternative to override_temp_dir #283

Job	Run time
Cargo deny (ubuntu-latest)	16s
Clippy and fmt	4s
OS Test (nightly, ubuntu-latest)	15s
WASI P1 Test Build	13s
OS Test (nightly, windows-latest)	31s
WASI P2 Test Build	14s
WASM Test Build	6s
OS Test (nightly, macos-latest)	23s
OS Test (stable, ubuntu-latest)	28s
OS Test (stable, windows-latest)	40s
OS Test (stable, macos-latest)	17s
OS Test (1.63, ubuntu-latest)	1m 51s
OS Test (1.63, windows-latest)	2m 16s
OS Test (1.63, macos-latest)	2m 5s
	9m 39s

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