Bump @azure/identity from 3.2.3 to 4.2.1

Bumps [@azure/identity](https://github.com/Azure/azure-sdk-for-js) from 3.2.3 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_3.2.3...@azure/identity_4.2.1)

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

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

package.json

@@ -6,7 +6,7 @@
   "bin": "./repeater.js",
   "dependencies": {
     "@azure/arm-compute": "^21.0.0",
-    "@azure/identity": "^3.4.2",
+    "@azure/identity": "^4.2.1",
     "@google-cloud/compute": "^4.4.0",
     "aws-sdk": "^2.1394.0",
     "azure-arm-network": "^11.1.0",