Fix links in README.md #2659

Job	Run time
Test	1m 10s
build_versions (stable)	13s
Test (charset)	1m 2s
Test	37s
build_versions (beta)	16s
Test (cookies)	57s
Test (charset)	30s
build_versions (1.71.1)	31s
Test (socks-proxy)	51s
Test (cookies)	43s
Test (gzip)	44s
Test (socks-proxy)	1m 5s
Test (brotli)	58s
cargo-deny (aarch64-apple-ios)	22s
Test (gzip)	29s
Test (json)	42s
cargo-deny (aarch64-linux-android)	18s
Test (brotli)	42s
Test (native-tls)	53s
cargo-deny (i686-pc-windows-gnu)	18s
Test (json)	34s
cargo-deny (i686-pc-windows-msvc)	20s
Test (native-tls)	50s
Docs	1m 29s
Lint	39s
cargo-deny (i686-unknown-linux-gnu)	20s
cargo-deny (wasm32-unknown-unknown)	18s
cargo-deny (x86_64-apple-darwin)	25s
cargo-deny (x86_64-apple-ios)	21s
cargo-deny (x86_64-pc-windows-gnu)	22s
cargo-deny (x86_64-pc-windows-msvc)	18s
cargo-deny (x86_64-unknown-linux-gnu)	24s
cargo-deny (x86_64-unknown-redox)	18s
	19m 59s

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