build(deps): bump @azure/identity in /src/order-service

Bumps [@azure/identity](https://github.com/Azure/azure-sdk-for-js) from 4.1.0 to 4.2.1.
- [Release notes](https://github.com/Azure/azure-sdk-for-js/releases)
- [Changelog](https://github.com/Azure/azure-sdk-for-js/blob/main/documentation/Changelog-for-next-generation.md)
- [Commits](https://github.com/Azure/azure-sdk-for-js/compare/@azure/identity_4.1.0...@azure/identity_4.2.1)

---
updated-dependencies:
- dependency-name: "@azure/identity"
  dependency-type: direct:production
...

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

Author: dependabot[bot]

src/order-service/package-lock.json

@@ -15,7 +15,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
-    "@azure/identity": "^4.1.0",
+    "@azure/identity": "^4.2.1",
     "@azure/service-bus": "^7.9.4",
     "@fastify/autoload": "^5.0.0",
     "@fastify/cors": "^8.3.0",