Bump c2pa from 0.73.0 to 0.73.1 (#366)

Bumps [c2pa](https://github.com/contentauth/c2pa-rs) from 0.73.0 to 0.73.1.
- [Release notes](https://github.com/contentauth/c2pa-rs/releases)
- [Changelog](https://github.com/contentauth/c2pa-rs/blob/main/CHANGELOG.md)
- [Commits](contentauth/c2pa-rs@c2pa-v0.73.0...c2pa-v0.73.1)

---
updated-dependencies:
- dependency-name: c2pa
  dependency-version: 0.73.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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

Author: dependabot[bot]

Cargo.lock

@@ -18,7 +18,7 @@ repository = "https://github.com/contentauth/c2pa-attacks"
 
 [dependencies]
 anyhow = "1.0"
-c2pa = { version = "0.73.0", features = ["fetch_remote_manifests", "file_io"] }
+c2pa = { version = "0.73.1", features = ["fetch_remote_manifests", "file_io"] }
 clap = { version = "4.5", features = ["derive", "env"] }
 env_logger = "0.11"
 log = "0.4"