fix(docs): prevent deadlocks with streams returned from docs actor #8482

Job	Run time
cargo deny	30s
Checking docs	1m 47s
Checking fmt	9s
check_semver	5m 14s
clippy_check	2m 55s
Cross Build Only (armv7-linux-androideabi)	1m 4s
Cross Build Only (aarch64-linux-android)	1m 0s
Cross Test (i686-unknown-linux-gnu)	2m 48s
Cross Build Only (x86_64-unknown-freebsd)	1m 7s
Minimal Supported Rust Version	1m 54s
Cross Build Only (x86_64-unknown-netbsd)	1m 7s
Run network simulations/benchmarks	7m 19s
Build wasm32	30s
CI Test Suite / Tests (ubuntu-latest, stable, all)	2m 37s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	4m 3s
CI Test Suite / Tests (ubuntu-latest, stable, none)	36s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	3m 45s
CI Test Suite / Tests (ubuntu-latest, stable, default)	2m 21s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	3m 50s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	3m 14s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	50s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	3m 5s
	51m 45s

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