Bump once_cell from 1.8.0 to 1.9.0

Bumps [once_cell](https://github.com/matklad/once_cell) from 1.8.0 to 1.9.0.
- [Release notes](https://github.com/matklad/once_cell/releases)
- [Changelog](https://github.com/matklad/once_cell/blob/master/CHANGELOG.md)
- [Commits](https://github.com/matklad/once_cell/compare/v1.8.0...v1.9.0)

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

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

Cargo.lock

@@ -962,9 +962,9 @@ dependencies = [
 
 [[package]]
 name = "once_cell"
-version = "1.8.0"
+version = "1.9.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "692fcb63b64b1758029e0a96ee63e049ce8c5948587f2f7208df04625e5f6b56"
+checksum = "da32515d9f6e6e489d7bc9d84c71b060db7247dc035bbe44eac88cf87486d8d5"
 
 [[package]]
 name = "os_str_bytes"

crates/integration_test/Cargo.toml

@@ -13,7 +13,7 @@ log = { version = "0.4", features = ["std"] }
 nix = "0.23.0"
 num_cpus = "1.0"
 oci-spec = { git = "https://github.com/containers/oci-spec-rs", rev = "54c5e386f01ab37c9305cc4a83404eb157e42440" }
-once_cell = "1.8.0"
+once_cell = "1.9.0"
 pnet = "0.28.0"
 procfs = "0.12.0"
 rand = "0.8.0"

crates/youki/Cargo.toml

@@ -21,7 +21,7 @@ liboci-cli = { path = "../liboci-cli" }
 log = {version = "0.4", features = ["std"]}
 nix = "0.23.0"
 oci-spec = { git = "https://github.com/containers/oci-spec-rs",  rev = "d6fb1e91742313cd0d0085937e2d6df5d4669720" }
-once_cell = "1.6.0"
+once_cell = "1.9.0"
 pentacle = "1.0.0"
 procfs = "0.12.0"
 serde = { version = "1.0", features = ["derive"] }