docs: document century cutoff for %y #1160

	name: codecov

	env:
	# It's really `--all-features`, but not adding the mutually exclusive features from rkyv
	ALL_NON_EXCLUSIVE_FEATURES: --features "default unstable-locales rkyv-64 rkyv-validation serde arbitrary"

	on:
	push:
	branches: [main, 0.5.x]
	pull_request:
	jobs:
	# Run code coverage using cargo-llvm-cov then upload to codecov.io
	job_code_coverage:
	name: llvm-cov
	runs-on: ubuntu-latest
	environment: Coverage
	env:
	CARGO_TERM_COLOR: always
	steps:
	- uses: actions/checkout@v4
	# nightly is required for --doctests, see cargo-llvm-cov#2
	- name: Install Rust (nightly)
	run: rustup update nightly
	- name: Install cargo-llvm-cov
	uses: taiki-e/install-action@cargo-llvm-cov
	- name: Generate code coverage
	run: cargo +nightly llvm-cov ${{ env.ALL_NON_EXCLUSIVE_FEATURES }} --workspace --lcov --doctests --output-path lcov.info
	- name: Upload coverage to Codecov
	uses: codecov/codecov-action@v4
	env:
	CODECOV_TOKEN: ${{ secrets.CODECOV_TOKEN }}
	with:
	files: lcov.info
	fail_ci_if_error: true

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