fix(comfyui-studio): correct character and drama YAML front matter

[hetaoBackend]

The comfyui-character and comfyui-drama skill descriptions contain colon-space sequences in unquoted YAML values, causing GitHub to show “mapping values are not allowed in this context” instead of rendering their front matter.

Use folded block scalars (>-) for both descriptions. The parsed description strings and Markdown bodies remain unchanged.

Validation:

• Reproduced both failures with Ruby Psych before the fix.
• Parsed all four ComfyUI Studio skill front matters with Ruby Psych after the fix; verified exact description equality and unchanged Markdown bodies against the base commit.
• npm run check: repository validation and all 128 tests passed.
• git diff --check: passed.

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