fix: Improve ClickUp task handling in closure script (#121)

- Added conditional data assignment in the axios request configuration to ensure data is sent only when provided.
- Removed unnecessary `include_closed` parameter from the task list API call for cleaner requests.
- Trimmed the API token in the authorization header to prevent potential issues with whitespace.
- Enhanced the check for the GitHub issue ID by using optional chaining to avoid errors with undefined values.