Update Docker image reference in README - #1

Description

Please include a summary of the change and which issue is fixed. Please also include relevant motivation and context. List any dependencies that are required for this change.

Fixes # (issue)

Type of change

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• [ ✓] This change requires a documentation update

🧪 How Has This Been Tested?

Please describe how you tested your changes so that maintainers can verify them. Include enough detail for someone else to reproduce your tests.

Checklist:

• [✓] Verified output manually
• [✓ ] Tested with relevant sample documents or data
• Wrote Vite Test Case (if applicable)

Expected Results:

• The docker image will be pulled from bentopdfteam/bentopdf instead

Checklist:

• [✓] My code follows the style guidelines of this project
• [✓] I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• [✓] I have made corresponding changes to the documentation
• [✓] My changes generate no new warnings
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• Any dependent changes have been merged and published in downstream modules