fix: response body timeout forwards the size hint #1850

Job	Run time
Check Style	11s
unstable features	10s
Android	31s
MSRV	1m 13s
linux / stable	47s
linux / nightly	1m 20s
linux / beta	50s
WASM	55s
macOS / stable	1m 27s
windows / stable-x86_64-msvc	3m 7s
windows / stable-i686-msvc	3m 40s
windows / stable-x86_64-gnu	5m 32s
windows / stable-i686-gnu	6m 0s
feat.: default-tls disabled	34s
feat.: rustls-tls	45s
feat.: rustls-tls-manual-roots	52s
feat.: rustls-tls-native-roots	45s
feat.: native-tls	46s
feat.: default-tls and rustls-tls	53s
feat.: cookies	57s
feat.: blocking	1m 4s
feat.: blocking only	50s
feat.: gzip	1m 0s
feat.: brotli	58s
feat.: deflate	53s
feat.: json	50s
feat.: multipart	51s
feat.: stream	52s
feat.: socks/default-tls	47s
feat.: socks/rustls-tls	58s
feat.: hickory-dns	1m 12s
Docs	1m 36s
CI is green	1s
	43m 7s

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