Update cel-interpreter requirement from 0.7.1 to 0.8.1 in /enclave

Updates the requirements on [cel-interpreter](https://github.com/clarkmcc/cel-rust) to permit the latest version.
- [Release notes](https://github.com/clarkmcc/cel-rust/releases)
- [Commits](clarkmcc/cel-rust@v0.7.1...v0.8.1)

---
updated-dependencies:
- dependency-name: cel-interpreter
  dependency-type: direct:production
...

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

enclave/Cargo.toml

@@ -17,7 +17,7 @@ anyhow = "1.0.83"
 aws-lc-rs = "1.8.1"
 base64 = "0.22.1"
 byteorder = "1.5.0"
-cel-interpreter = "0.7.1"
+cel-interpreter = "0.8.1"
 chrono = { version = "0.4.38", default-features = false, features = ["std", "clock"] }
 hex = "0.4.3"
 serde = { version = "1.0.204", features = ["derive"] }