Update azure_core requirement in /azure_devops_rust_api

Updates the requirements on [azure_core](https://github.com/azure/azure-sdk-for-rust) to permit the latest version.
- [Release notes](https://github.com/azure/azure-sdk-for-rust/releases)
- [Commits](https://github.com/azure/azure-sdk-for-rust/compare/azure_core@0.33.0...azure_core@0.34.0)

---
updated-dependencies:
- dependency-name: azure_core
  dependency-version: 0.34.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

azure_devops_rust_api/Cargo.toml

@@ -21,7 +21,7 @@ rust-version = "1.80.0"
 doctest = false
 
 [dependencies]
-azure_core = { version = "0.33", default-features = true }
+azure_core = { version = "0.34", default-features = true }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 bytes = "1"