fix(ci): update deny.toml to ignore RUSTSEC-2024-0384

[hanabi1224]

Description

Ignore RUSTSEC-2024-0384 in deny.toml to let CI pass.

Notes & open questions

Change checklist

• I have performed a self-review of my own code
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• A changelog entry has been made in the appropriate crates

[drHuangMHT]

cargo-deny test is not required to merge a PR, I don't think this is necessary.

[jxs]

Thanks for this @hanabi1224, and for your work on rust-netlink/netlink-sys#25!
I agree with @drHuangMHT I'd rather have CI red and confronting/recalling us to act (deprecating async-std) than silently ignore this issue.