Bump @azure/identity from 2.0.2 to 2.0.4

Bumps [@azure/identity](https://github.com/Azure/azure-sdk-for-js) from 2.0.2 to 2.0.4.
- [Release notes](https://github.com/Azure/azure-sdk-for-js/releases)
- [Commits](https://github.com/Azure/azure-sdk-for-js/compare/@azure/identity_2.0.2...@azure/identity_2.0.4)

---
updated-dependencies:
- dependency-name: "@azure/identity"
  dependency-type: direct:development
  update-type: version-update:semver-patch
...

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Author: dependabot[bot]