chore(letsplot): set quality score for bar-basic

Author: github-actions[bot]

plots/bar-basic/metadata/letsplot.yaml

@@ -15,7 +15,7 @@ current:
   generated_by: claude-opus-4-5-20251101
   workflow_run: 20188986965
   issue: 612
-  quality_score: null
+  quality_score: 
   # Version info (filled by workflow)
   python_version: "3.13"
   library_version: ""