fix: typos in documentation files #513

Job	Run time
Check (stable)	26s
Clippy (stable)	30s
Rustfmt (stable)	5s
Miri	1m 26s
Test Suite	2m 7s
Test Suite (--no-default-features)	1m 57s
Test Suite (stable)	55s
Test Suite (ubuntu-latest)	24s
Test Suite (--no-default-features --features track-caller)	1m 54s
Test Suite (stable, --no-default-features)	52s
Test Suite (windows-latest)	16s
Test Suite (--no-default-features --features auto-install)	1m 56s
Test Suite (stable, --no-default-features --features track-caller)	50s
Test Suite (stable, --no-default-features --features auto-install)	1m 0s
Test Suite (macOS-latest)	24s
Test Suite (stable, --features pyo3)	58s
Test Suite (stable, --all-features)	1m 3s
Test Suite (beta)	1m 4s
Test Suite (beta, --no-default-features)	1m 0s
Test Suite (beta, --no-default-features --features track-caller)	59s
Test Suite (beta, --no-default-features --features auto-install)	1m 3s
Test Suite (beta, --features pyo3)	1m 7s
Test Suite (beta, --all-features)	1m 8s
Test Suite (nightly)	1m 13s
Test Suite (nightly, --no-default-features)	1m 3s
Test Suite (nightly, --no-default-features --features track-caller)	1m 0s
Test Suite (nightly, --no-default-features --features auto-install)	1m 5s
Test Suite (nightly, --features pyo3)	1m 8s
Test Suite (nightly, --all-features)	1m 10s
	30m 3s

Provide feedback