Add pining sub dependency libc to changelog #510

Job	Run time
cargo-deny (advisories)	17s
lint	29s
cargo-deny (bans licenses sources)	22s
aarch64-apple-darwin / build	46s
aarch64-apple-darwin-nightly / build	36s
aarch64-apple-ios / build	45s
aarch64-unknown-linux-gnu / build	31s
aarch64-unknown-linux-musl / build	1m 4s
arm-linux-androideabi / build	37s
armv7-linux-androideabi / build	37s
i686-pc-windows-gnu / build	1m 59s
i686-pc-windows-msvc / build	2m 31s
i686-unknown-linux-gnu / build	53s
i686-unknown-linux-musl / build	1m 14s
msrv-aarch64-apple-darwin / build	1m 3s
msrv-arm-linux-androideabi / build	1m 8s
msrv-x86_64-pc-windows-msvc / build	55s
msrv-x86_64-unknown-freebsd / build	1m 4s
msrv-x86_64-unknown-linux-gnu / build	59s
msrv-x86_64-unknown-linux-musl / build	1m 10s
msrv-x86_64-unknown-netbsd / build	1m 3s
x86_64-apple-darwin / build	45s
x86_64-pc-windows-gnu / build	2m 2s
x86_64-pc-windows-msvc / build	1m 33s
x86_64-pc-windows-msvc-nightly / build	1m 12s
x86_64-unknown-freebsd / build	30s
x86_64-unknown-linux-gnu / build	1m 7s
x86_64-unknown-linux-gnu-nightly / build	55s
x86_64-unknown-linux-musl / build	1m 4s
x86_64-unknown-netbsd / build	38s
	29m 49s

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