build

fix: pin CI nightly to 2025-02-23 and temporarily disable codecov #1005

Job	Run time
build_and_test_windows	42s
clippy	1m 0s
build_and_test_macos (macos-13)	59s
build_and_test (stable, --features "")	59s
build_and_test_macos (macos-latest)	51s
build_and_test (stable, --all-features)	58s
fmt	27s
minimal-versions	55s
build_and_test (stable, --no-default-features)	54s
build_and_test (1.82, --features "")	58s
semver	45s
build_and_test (1.82, --all-features)	58s
build_and_test (1.82, --no-default-features)	58s
build_and_test (beta, --features "")	57s
build_and_test (beta, --all-features)	58s
build_and_test (beta, --no-default-features)	57s
build_and_test (nightly-2025-02-23, --features "")	58s
build_and_test (nightly-2025-02-23, --all-features)	58s
build_and_test (nightly-2025-02-23, --no-default-features)	54s
	17m 6s

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