Finalize 1.3.7 release documentation #326

Job	Run time
Miri	1m 18s
Format, lint, test, and audit	5m 35s
Platform tests (ubuntu-latest)	30s
no_std target build (x86_64-unknown-linux-gnu)	16s
no_std target build (thumbv7em-none-eabihf)	21s
no_std target build (aarch64-unknown-linux-gnu)	23s
no_std target build (wasm32-unknown-unknown)	22s
Platform tests (macos-26)	52s
Platform tests (macos-latest)	48s
Platform tests (macos-15)	43s
no_std target build (x86_64-unknown-freebsd)	17s
Rust compatibility (1.90.0)	24s
Rust compatibility (1.95.0)	22s
Rust compatibility (1.94.0)	22s
Platform tests (windows-latest)	40s
Rust compatibility (1.96.0)	24s
Platform tests (macos-15-intel)	1m 38s
Rust compatibility (1.97.0)	20s
Rust compatibility (1.96.1)	26s
Rust compatibility (1.92.0)	28s
Rust compatibility (1.91.0)	29s
Rust compatibility (1.93.0)	25s
	17m 23s

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