Update README.md

This dataset provides two screenshot images for each design in the CSS Zen Garden (www.csszengarden.com) accompanied by an in-depth design analysis created by claude-3-7-sonnet. For each design a full-site mobile and desktop image was taken, with the exception of certain horizontal layouts.

README.md

@@ -6,6 +6,7 @@ language:
 - en
 tags:
 - code
+- multimodal
 pretty_name: CSS Zen Garden Design Analyses
 size_categories:
 - n<1K