build(deps): bump codecov/codecov-action from 5.1.1 to 5.1.2 #1455

Job	Run time
actionlint	8s
build with default features	32s
build with MSRV (1.66.1)	1m 54s
build with no_std (ristretto255)	27s
Clippy	36s
Check Rust doc	23s
build with no_std (ed25519)	28s
Rustfmt	8s
Check if automatically generated code is up to date	21s
build with no_std (p256)	22s
test on beta	2m 26s
build with no_std (secp256k1)	22s
build with no_std (secp256k1-tr)	26s
build with no_std (rerandomized)	17s
	8m 50s

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