chore(FR-942): change Backend.AI Badge to revised logo

[nowgnuesLee]

resolves #NNN (FR-942)

We replaced the Backend.AI logo with the new logo in that PR.

Checklist: (if applicable)

• Documentation
• Minium required manager version
• Specific setting for review (eg., KB link, endpoint or how to setup)
• Minimum requirements to check during review
• Test case(s) to demonstrate the difference of before/after

[nowgnuesLee]

• chore(FR-942): change Backend.AI Badge to revised logo #3605 👈 (View in Graphite)
• main

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