Add atlan to marketplace

.claude-plugin/marketplace.json

@@ -1040,14 +1040,14 @@
       "homepage": "https://github.com/intercom/claude-plugin-external"
     },
     {
-      "name": "postiz",
-      "description": "Social media automation CLI for scheduling posts, managing integrations, uploading media, and tracking analytics across 28+ platforms including X, LinkedIn, Reddit, YouTube, TikTok, Instagram, and more",
+      "name": "atlan",
+      "description": "Atlan data catalog plugin for Claude Code. Search, explore, govern, and manage your data assets through natural language. Powered by the Atlan MCP server with semantic search, lineage traversal, glossary management, data quality rules, and more.",
       "source": {
         "source": "url",
-        "url": "https://github.com/gitroomhq/postiz-agent.git",
-        "sha": "c5d1bf5f7e95a71e230fc19ae2150ddd9c549854"
+        "url": "https://github.com/atlanhq/agent-toolkit.git",
+        "sha": "acdf284da6aa98b14f8dad90a9827006d8df425c"
       },
-      "homepage": "https://postiz.com/agent"
+      "homepage": "https://docs.atlan.com/"
     }
   ]
 }