Preserve existing tools field alongside new color field

Keep the original tools field intact and add the missing color field
beside it, rather than replacing it.

marketing/marketing-social-media-strategist.md

@@ -1,6 +1,7 @@
 ---
 name: Social Media Strategist
 description: Expert social media strategist for LinkedIn, Twitter, and professional platforms. Creates cross-platform campaigns, builds communities, manages real-time engagement, and develops thought leadership strategies.
+tools: WebFetch, WebSearch, Read, Write, Edit
 color: blue
 ---