Update to document-features 0.2.8 #9269

Job	Run time
android	47s
cargo-deny aarch64-apple-darwin	39s
Check wasm32 + wasm-bindgen	2m 53s
cargo-deny aarch64-linux-android	42s
Format + check + test	9m 42s
cargo-deny i686-pc-windows-gnu	38s
cargo-deny i686-pc-windows-msvc	42s
Check Windows	3m 12s
cargo-deny i686-unknown-linux-gnu	38s
cargo-deny wasm32-unknown-unknown	39s
cargo-deny x86_64-apple-darwin	39s
cargo-deny x86_64-pc-windows-gnu	38s
cargo-deny x86_64-pc-windows-msvc	41s
cargo-deny x86_64-unknown-linux-gnu	39s
cargo-deny x86_64-unknown-linux-musl	38s
cargo-deny x86_64-unknown-redox	40s
	24m 27s

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