fix(deps): bump aws-sdk-cognitoidentity from 1.88.0 to 1.90.0

Bumps [aws-sdk-cognitoidentity](https://github.com/awslabs/aws-sdk-rust) from 1.88.0 to 1.90.0.
- [Release notes](https://github.com/awslabs/aws-sdk-rust/releases)
- [Commits](https://github.com/awslabs/aws-sdk-rust/commits)

---
updated-dependencies:
- dependency-name: aws-sdk-cognitoidentity
  dependency-version: 1.90.0
  dependency-type: direct:production
...

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

Author: dependabot[bot]

Cargo.lock

@@ -16,7 +16,7 @@ amzn-toolkit-telemetry-client = { path = "../amzn-toolkit-telemetry-client" }
 anyhow.workspace = true
 async-trait.workspace = true
 aws-credential-types = "1.1.6"
-aws-sdk-cognitoidentity = "1.51.0"
+aws-sdk-cognitoidentity = "1.90.0"
 aws-sdk-cognitoidentityprovider = "1.60.1"
 aws-smithy-async = "1.2.2"
 aws-smithy-types = "1.2.10"