feat: align website style with www.rust-lang.org for consistency #1788

Job	Run time
build-windows-pr (dev, x86_64-pc-windows-msvc)	19m 22s
build-linux-pr (dev, x86_64-unknown-linux-gnu)	9m 26s
build-windows-pr (dev, aarch64-pc-windows-msvc)	14m 35s
build-linux-pr (dev, armv7-unknown-linux-gnueabihf)	3m 44s
build-windows-master	0s
build-windows-pr (dev, x86_64-pc-windows-gnu)	9m 9s
build-linux-stable	0s
build-linux-pr (dev, aarch64-linux-android)	3m 42s
build-windows-pr (release, x86_64-pc-windows-msvc)	8m 40s
build-linux-pr (release, x86_64-unknown-linux-gnu)	5m 38s
build-windows-pr (release, aarch64-pc-windows-msvc)	9m 4s
build-linux-pr (release, armv7-unknown-linux-gnueabihf)	5m 6s
build-windows-stable	0s
build-windows-pr (release, x86_64-pc-windows-gnu)	10m 10s
build-linux-pr (release, aarch64-linux-android)	4m 44s
build-all-features (ubuntu-latest, x86_64-unknown-linux-gnu)	5m 2s
build-freebsd-master	0s
build-all-features (windows-latest, x86_64-pc-windows-msvc)	12m 40s
build-freebsd-stable	0s
build-linux-master	0s
build-macos-x86_64 (dev, x86_64-apple-darwin)	13m 8s
build-macos-aarch64 (dev, aarch64-apple-darwin)	12m 7s
build-macos-x86_64 (release, x86_64-apple-darwin)	6m 13s
build-macos-aarch64 (release, aarch64-apple-darwin)	6m 29s
check	3m 2s
doc	4s
conclusion	1s
	2h 42m 6s

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