docs: improve security documentation #284

Job	Run time
WASI P1 Test Build	13s
Cargo deny (ubuntu-latest)	20s
OS Test (nightly, ubuntu-latest)	16s
Clippy and fmt	16s
WASI P2 Test Build	13s
OS Test (nightly, windows-latest)	37s
WASM Test Build	10s
OS Test (nightly, macos-latest)	19s
OS Test (stable, ubuntu-latest)	11s
OS Test (stable, windows-latest)	1m 20s
OS Test (stable, macos-latest)	14s
OS Test (1.63, ubuntu-latest)	1m 54s
OS Test (1.63, windows-latest)	2m 25s
OS Test (1.63, macos-latest)	1m 52s
	10m 20s

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