Fix short_description length for HF Spaces deployment

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Co-Authored-By: Claude <noreply@anthropic.com>

README.md

@@ -9,7 +9,7 @@ app_file: app.py
 python_version: 3.10
 pinned: false
 license: apache-2.0
-short_description: 'Transform UI screenshots into structured design token libraries'
+short_description: 'Transform UI screenshots into design tokens'
 ---
 
 # 🎨 Design Token Extractor