build(deps): bump once_cell from 1.20.3 to 1.21.1

Bumps [once_cell](https://github.com/matklad/once_cell) from 1.20.3 to 1.21.1.
- [Changelog](https://github.com/matklad/once_cell/blob/master/CHANGELOG.md)
- [Commits](matklad/once_cell@v1.20.3...v1.21.1)

---
updated-dependencies:
- dependency-name: once_cell
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

Cargo.lock

@@ -11,7 +11,7 @@ clap = { version = "4.5", features = ["derive"] }
 ipnet = { version = "2.11", features = ["serde"] }
 libc = "0.2"
 log = { version = "0.4", features = ["std"] }
-once_cell = "1.20"
+once_cell = "1.21"
 regex = "1.10"
 serde = "1.0"
 serde_yaml = "0.9"