Bump @azure/identity from 3.4.1 to 4.2.1 in /build (#214913)

Bumps [@azure/identity](https://github.com/Azure/azure-sdk-for-js) from 3.4.1 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_3.4.1...@azure/identity_4.2.1)

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

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: João Moreno <joao.moreno@microsoft.com>

build/package.json

@@ -4,7 +4,7 @@
   "license": "MIT",
   "devDependencies": {
     "@azure/cosmos": "^3",
-    "@azure/identity": "^3.4.1",
+    "@azure/identity": "^4.2.1",
     "@azure/storage-blob": "^12.17.0",
     "@electron/get": "^2.0.0",
     "@types/ansi-colors": "^3.2.0",