Bump @azure/identity and botframework-connector in /example

Bumps [@azure/identity](https://github.com/Azure/azure-sdk-for-js) and [botframework-connector](https://github.com/Microsoft/botbuilder-js). These dependencies needed to be updated together.

Updates `@azure/identity` from 2.1.0 to 4.4.1
- [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_2.1.0...@azure/identity_4.4.1)

Updates `botframework-connector` from 4.19.1 to 4.23.0
- [Release notes](https://github.com/Microsoft/botbuilder-js/releases)
- [Commits](microsoft/botbuilder-js@4.19.1...4.23.0)

---
updated-dependencies:
- dependency-name: "@azure/identity"
  dependency-type: indirect
- dependency-name: botframework-connector
  dependency-type: indirect
...

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Author: dependabot[bot]