Fix duplicate 'the' typo in UBTECH Yanshee documentation

[erenyegit]

Overview

This pull request fixes a minor documentation typo where a duplicated word ("the the") appeared in the UBTECH Yanshee setup guide.
No functional or behavioral changes are included.

(If applicable, linked issue: N/A)

Type of change

• Bug fix
• New feature
• Documentation improvement
• Bounty issue submission
• Other:

Changes

• Fixed a duplicated word ("the the" → "the") in docs/robotics/ubtech_yanshee.mdx.
• No code or test files were modified.

Checklist

• Code complies with style guidelines
• Self-review completed
• Documentation updated (if applicable)
• Local testing completed
• Tests added/updated (if applicable)

Impact

This change improves documentation clarity and readability.
There is no impact on functionality, tests, or runtime behavior.

Additional Information

This is a small, isolated documentation-only change intended to keep the documentation clean and accurate.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ All tests successful. No failed tests found.

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