Update azure core and identity to 0.21 (#517)

Author: dsteeley

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Changes
+- Update `azure_core`, `azure_identity` to 0.21.
+
+
 ### [0.23.0]
 
 ### Breaking change
@@ -59,7 +63,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   - Change example code `util::get_credential` return type from `Credential` to `Result<Credential>`,
     as `DefaultAzureCredentialBuilder::build()` is now fallible.
   - Reinstate wasm build in CI pipeline.
-  - Fix `telemetry` code wasm build. 
+  - Fix `telemetry` code wasm build.
 - Update `vsts-rest-api-specs` to latest version
   - Additional parameters in `approvals_and_checks::ApprovalQueryParameters`
     - `approver_status`

azure_devops_rust_api/Cargo.toml

@@ -23,7 +23,7 @@ rust-version = "1.64.0"
 doctest = false
 
 [dependencies]
-azure_core = { version = "0.20", default-features = true }
+azure_core = { version = "0.21", default-features = true }
 serde = { version = "1", features = ["derive"] }
 serde_json = "1"
 bytes = "1"
@@ -35,7 +35,7 @@ tracing = "0.1"
 once_cell = "1"
 
 [dev-dependencies]
-azure_identity = "0.20"
+azure_identity = "0.21"
 tokio = { version = "1", features = ["full"] }
 anyhow = "1"
 tracing-subscriber = "0.3"