zha: Update to bellows 0.3.4

[rcloran]

Description:

Related issue (if applicable): fixes #7473 , fixes #8532

Pull request in home-assistant.github.io with documentation (if applicable): home-assistant/home-assistant.github.io#<home-assistant.github.io PR number goes here>

Example entry for configuration.yaml (if applicable):

Checklist:

If user exposed functionality or configuration variables are added/changed:

• Documentation added/updated in home-assistant.github.io

If the code communicates with devices, web services, or third-party tools:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• New dependencies have been added to the REQUIREMENTS variable (example).
• New dependencies are only imported inside functions that use them (example).
• New dependencies have been added to requirements_all.txt by running script/gen_requirements_all.py.
• New files were added to .coveragerc.

If the code does not interact with devices:

• Local tests with tox run successfully. Your PR cannot be merged unless tests pass
• Tests have been added to verify that the new code works.

[mention-bot]

@rcloran, thanks for your PR! By analyzing the history of the files in this pull request, we identified @fabaff, @balloob and @rmkraus to be potential reviewers.

[rcloran]

I'd like to request this for 0.49.1, if one is planned. I don't know how to do that.

[rcloran]

Hrm - there's a log message I keep getting reports about. Let me build 0.3.4 to drop the level of that.

[balloob]

I'll prepare a release tomorrow 👍