Add test coverage for _update_bootstrap_soon method in src/uiprotect/api.py

[coderabbitai]

The method added in PR #96 lacks test coverage. This method is crucial for ensuring the reliability of the update mechanism by triggering an update task if not already running. It is important to add tests to cover this functionality to prevent potential issues in production. File: src/uiprotect/api.py, Lines: 285, 289-290. PR: #96