Fix Help Button Link at Bottom of GovTool App

## Description
The **Help** button at the bottom of the **GovTool app** currently links to:
`https://docs.gov.tools/cardano-govtool/support`
However, this page does **not exist** in the GitBook documentation.

The link should be updated to point to a **valid and existing support or documentation page**.

## Acceptance Criteria
- [ ] The Help button links to a **valid and existing page** in the GovTool GitBook documentation.
- [ ] The broken link (`/support`) is removed or updated.