Prepare 2.12.0 release #2534

Job	Run time
build_versions (stable)	33s
Test	46s
build_versions (beta)	34s
Test (json)	49s
build_versions (1.67.0)	31s
cargo-deny (aarch64-apple-ios)	17s
Test (charset)	53s
cargo-deny (aarch64-linux-android)	20s
Test (cookies)	53s
Docs	31s
Test (socks-proxy)	47s
cargo-deny (i686-pc-windows-gnu)	22s
Test (native-certs)	44s
cargo-deny (i686-pc-windows-msvc)	20s
Test (gzip)	45s
cargo-deny (i686-unknown-linux-gnu)	21s
Lint	21s
Test (brotli)	39s
cargo-deny (wasm32-unknown-unknown)	17s
Test (http-crate)	48s
cargo-deny (x86_64-apple-darwin)	21s
Test (http-interop)	52s
cargo-deny (x86_64-apple-ios)	18s
cargo-deny (x86_64-pc-windows-gnu)	22s
Test (http-crate http-interop)	54s
Test (tls)	52s
Test (tls, json)	53s
cargo-deny (x86_64-pc-windows-msvc)	19s
Test (tls, charset)	56s
cargo-deny (x86_64-unknown-linux-gnu)	19s
Test (tls, cookies)	1m 1s
cargo-deny (x86_64-unknown-redox)	18s
Test (tls, socks-proxy)	55s
Test (tls, native-certs)	54s
Test (tls, gzip)	57s
Test (tls, brotli)	1m 6s
Test (tls, http-crate)	1m 1s
Test (tls, http-interop)	58s
Test (tls, http-crate http-interop)	1m 1s
Test (native-tls)	52s
Test (native-tls, json)	52s
Test (native-tls, charset)	51s
Test (native-tls, cookies)	56s
Test (native-tls, socks-proxy)	51s
Test (native-tls, native-certs)	53s
Test (native-tls, gzip)	54s
Test (native-tls, brotli)	53s
Test (native-tls, http-crate)	48s
Test (native-tls, http-interop)	54s
Test (native-tls, http-crate http-interop)	56s
	35m 28s

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