fix(docs): prevent deadlocks with streams returned from docs actor #8487

Job	Run time
Cross Test (i686-unknown-linux-gnu)	2m 32s
Cross Build Only (armv7-linux-androideabi)	1m 2s
Build wasm32	29s
Cross Build Only (aarch64-linux-android)	1m 0s
Cross Build Only (x86_64-unknown-freebsd)	1m 8s
Cross Build Only (x86_64-unknown-netbsd)	1m 11s
cargo deny	30s
Checking docs	1m 10s
Checking fmt	10s
check_semver	2m 22s
clippy_check	2m 27s
Minimal Supported Rust Version	1m 9s
Run network simulations/benchmarks	1m 20s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1m 30s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1m 23s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	2m 25s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1s
CI Test Suite / Tests (ubuntu-latest, stable, default)	1m 26s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	2m 27s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	2m 38s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	1s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	2m 36s
	30m 57s

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