Update vision.py - Update version of model moondream2 2024-04-02 to 2024-08-26

[rudy500]

Update version of model moondream2 2024-04-02 to 2024-08-26

Describe the changes you have made:

Update variable revision = "2024-04-02" to revision = "2024-08-26" latest actually

Reference any relevant issues (e.g. "Fixes #000"):

Pre-Submission Checklist (optional but appreciated):

• [ ] I have included relevant documentation updates (stored in /docs)
• [ ] I have read docs/CONTRIBUTING.md
• [ ] I have read docs/ROADMAP.md

OS Tests (optional but appreciated):

• [X] Tested on Windows
• [X] Tested on MacOS
• [X] Tested on Linux