Bump once_cell from 1.19.0 to 1.20.0 (#286)

Bumps [once_cell](https://github.com/matklad/once_cell) from 1.19.0 to 1.20.0.
- [Changelog](https://github.com/matklad/once_cell/blob/master/CHANGELOG.md)
- [Commits](matklad/once_cell@v1.19.0...v1.20.0)

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

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

Cargo.lock

@@ -33,7 +33,7 @@ humantime = "2.1.0"
 lru-cache = "0.1.2"
 nix = { version = "0.27.1", features = ["net"] }
 omicron-zone-package = "0.11.0"
-once_cell = "1.19.0"
+once_cell = "1.20.0"
 paste = "1.0.15"
 rand = "0.8.5"
 serde = { version = "1.0", default-features = false, features = ["derive"] }