fix: add line break between platform reference links

Separates the two reference links so they render as distinct lines
instead of a single block.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

skills/social-content/SKILL.md

@@ -49,6 +49,7 @@ Gather this context (ask if not provided):
 | Facebook | Communities, local businesses | 1-2x/day | Groups, native video |
 
 **For detailed platform strategies**: See [references/platforms.md](references/platforms.md)
+
 **For hashtag limits and character counts**: See [references/platform-limits.md](references/platform-limits.md)
 
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