Bump libc from 0.2.120 to 0.2.121

Bumps [libc](https://github.com/rust-lang/libc) from 0.2.120 to 0.2.121.
- [Release notes](https://github.com/rust-lang/libc/releases)
- [Commits](https://github.com/rust-lang/libc/compare/0.2.120...0.2.121)

---
updated-dependencies:
- dependency-name: libc
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

Cargo.toml

@@ -45,7 +45,7 @@ regex = "1"
 ioctl-rs = { version = "0.2", optional = true }
 serde_cbor = "0.11.2"
 pancurses = { version = "0.17.0", optional = true }
-libc = "0.2.120"
+libc = "0.2.121"
 parse_duration = "2.1.1"
 
 [dependencies.rspotify]