Inconsistent document title behavior

[doniv79]

Thanks for making this plugin! I just used it for the first time today and was experiencing unexpected behavior. Here are the steps:

1. Write a document in Obsidian
2. Publish to Quip using "Publish as new Quip document"
3. Observe that the title (Heading 1) in the Quip doc exists, reflecting the title in Obsidian
4. Make changes to the doc in Obsidian
5. Publish to Quip using "Update existing Quip document"
6. Observe that the title in the Quip doc no longer exists

Expected behavior:
The title in the Quip doc should persist through published updates.