chore: release v1.2.6 #2134

Job	Run time
Test wasm32-wasip1-thread	32s
Test build-std (aarch64-tvos)	2m 10s
Test build-std (aarch64-tvos-sim)	2m 1s
Clippy	14s
Test wasm (wasm32-unknown-unknown)	18s
Test build-std (x86_64-tvos)	2m 1s
Test CUDA support	39s
MSRV (ubuntu-latest)	19s
Rustfmt	5s
semver-checks	7s
MSRV (windows-latest)	46s
MSRV (macos-latest)	28s
Test (stable)	1m 42s
Test (beta)	1m 41s
Test (nightly)	2m 0s
Test (linux32)	2m 2s
Test (macos)	4m 3s
Test (aarch64-macos)	1m 32s
Test (aarch64-ios)	1m 11s
Test (win32)	2m 57s
Test (win64)	3m 55s
Test (mingw32)	3m 17s
Test (mingw64)	3m 17s
Test (windows-2019)	2m 55s
Test (windows-aarch64, windows-latest, stable, aarch64-pc-windows-msvc, --no-run)	3m 45s
Test (windows-clang, windows-2019, stable, x86_64-pc-windows-msvc, clang, clang++)	4m 25s
Test (windows-clang-cl, windows-2019, stable, x86_64-pc-windows-msvc, clang-cl, clang-cl)	4m 25s
	52m 47s

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