chore: clarify ninja dep error message

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[codecov]

Codecov Report

❌ Patch coverage is 0% with 6 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.00%. Comparing base (b4d6540) to head (ad120ce).
⚠️ Report is 4 commits behind head on develop.

Files with missing lines	Patch %	Lines
vortex-duckdb/build.rs	0.00%	6 Missing ⚠️

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