Fix incorrect reading of correct utf8 #2827

Job	Run time
Docs	1m 50s
Test	51s
build_versions (stable)	11s
Test	43s
build_versions (beta)	13s
cargo-deny (aarch64-apple-ios)	20s
Test (charset)	42s
Test (charset)	1m 7s
cargo-deny (aarch64-linux-android)	20s
Test (cookies)	52s
build_versions (1.71.1)	14s
cargo-deny (i686-pc-windows-gnu)	20s
Test (cookies)	1m 11s
Test (socks-proxy)	50s
cargo-deny (i686-pc-windows-msvc)	20s
Test (socks-proxy)	52s
Test (gzip)	43s
cargo-deny (i686-unknown-linux-gnu)	22s
Test (gzip)	50s
Test (brotli)	44s
cargo-deny (wasm32-unknown-unknown)	26s
Test (brotli)	51s
Test (json)	46s
cargo-deny (x86_64-apple-darwin)	22s
Test (json)	55s
Test (native-tls)	47s
Lint	49s
cargo-deny (x86_64-apple-ios)	23s
Test (native-tls)	58s
cargo-deny (x86_64-pc-windows-gnu)	21s
Test (rustls-no-provider)	55s
cargo-deny (x86_64-pc-windows-msvc)	21s
cargo-deny (x86_64-unknown-linux-gnu)	21s
cargo-deny (x86_64-unknown-redox)	19s
	22m 9s

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