Update FAQ.md

[mrtdlgc]

To correct info regarding partial withdrawals not being automatic yet, but planned to be subsidized in the future.

What

• (describe the changes in detail)

Refs

• (this project accepts pull requests related to open issues)
• (if suggesting a new feature or change, please discuss it in an issue first)
• (if fixing a bug, there should be an issue describing it with steps to reproduce)
• (only fixing a minor bug - broken link, typo - an issue is not needed)
• (please link to the issue here)

[zengzengzenghuy]

Thank you @mrtdlgc 🥇