Fix code style warnings in communication module

[mayssamm]

---

This checklist is used to make sure that common guidelines for a pull request are followed.

Related command

General Guidelines

• [ x] Have you run azdev style <YOUR_EXT> locally? (pip install azdev required)
  azdev style communication PASSED
• [ x] Have you run python scripts/ci/test_index.py -q locally?
  azdev test communication PASSED

For new extensions:

• My extension description/summary conforms to the Extension Summary Guidelines.

About Extension Publish

There is a pipeline to automatically build, upload and publish extension wheels.
Once your pull request is merged into main branch, a new pull request will be created to update src/index.json automatically.
The precondition is to put your code inside this repository and upgrade the version in the pull request but do not modify src/index.json.

[yonzhan]

communication

[mayssamm]

Published again PR 4959.