Bump base64 from 0.21.7 to 0.22.1 (#27)

Bumps [base64](https://github.com/marshallpierce/rust-base64) from 0.21.7 to 0.22.1.
- [Changelog](https://github.com/marshallpierce/rust-base64/blob/master/RELEASE-NOTES.md)
- [Commits](marshallpierce/rust-base64@v0.21.7...v0.22.1)

---
updated-dependencies:
- dependency-name: base64
  dependency-version: 0.22.1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -34,7 +34,7 @@ atlas-c2pa-lib = { version = "0.1.0" }
 tdx_workload_attestation = { version = "0.1.0", default-features = false }
 
 # Core libraries
-base64 = "0.21"
+base64 = "0.22"
 chrono = "0.4.41"  # For timestamp generation in mock attestation reports
 env_logger = "0.11"
 hex = "0.4"