deps(rust): bump validator from 0.18.1 to 0.20.0

Bumps [validator](https://github.com/Keats/validator) from 0.18.1 to 0.20.0.
- [Changelog](https://github.com/Keats/validator/blob/master/CHANGELOG.md)
- [Commits](Keats/validator@v0.18.1...v0.20.0)

---
updated-dependencies:
- dependency-name: validator
  dependency-version: 0.20.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Cargo.lock

@@ -70,7 +70,7 @@ blake3 = "1.5"
 tokio-stream = { version = "0.1", features = ["sync"] }
 
 # Validation
-validator = { version = "0.18", features = ["derive"] }
+validator = { version = "0.20", features = ["derive"] }
 
 # Regular expressions (for SPARQL FILTER)
 regex = "1.10"