chore(deps): bump oci-spec from 0.7.1 to 0.8.3

Bumps [oci-spec](https://github.com/youki-dev/oci-spec-rs) from 0.7.1 to 0.8.3.
- [Release notes](https://github.com/youki-dev/oci-spec-rs/releases)
- [Changelog](https://github.com/youki-dev/oci-spec-rs/blob/main/release.md)
- [Commits](youki-dev/oci-spec-rs@v0.7.1...v0.8.3)

---
updated-dependencies:
- dependency-name: oci-spec
  dependency-version: 0.8.3
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -32,7 +32,7 @@ spin-factor-outbound-networking = { git = "https://github.com/spinframework/spin
 wasmtime = "37.0.1"
 openssl = { version = "*", features = ["vendored"] }
 anyhow = "1.0"
-oci-spec = "0.7"
+oci-spec = "0.8"
 futures = "0.3"
 ctrlc = { version = "3.4", features = ["termination"] }