Update low-level-rustls example #5007

Job	Run time
check-docs	28s
cargo-public-api-crates (axum)	52s
check	2m 26s
cargo-hack	3m 49s
cargo-public-api-crates (axum-core)	10m 38s
cargo-deny check (advisories)	25s
cargo-public-api-crates (axum-extra)	5m 54s
cargo-deny check (bans licenses sources)	23s
cargo-public-api-crates (axum-macros)	44s
dependencies-are-sorted	10m 36s
Spell Check with Typos	10m 6s
test-nightly	1m 19s
test-msrv	2m 29s
armv5te-unknown-linux-musleabi	25s
test-docs	11m 15s
test-versions (stable)	12m 39s
wasm32-unknown-unknown	13s
test-versions (beta)	3m 57s
	1h 18m 38s

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