Add postiz to marketplace

.claude-plugin/marketplace.json

@@ -1040,14 +1040,14 @@
       "homepage": "https://github.com/intercom/claude-plugin-external"
     },
     {
-      "name": "prisma",
-      "description": "Prisma MCP integration for Postgres database management, schema migrations, SQL queries, and connection string management. Provision Prisma Postgres databases, run migrations, and interact with your data directly.",
+      "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",
       "source": {
         "source": "url",
-        "url": "https://github.com/prisma/claude-plugin.git",
-        "sha": "815dbc4a045a29e3b81510ba0e3ab806f1baaf0e"
+        "url": "https://github.com/gitroomhq/postiz-agent.git",
+        "sha": "c5d1bf5f7e95a71e230fc19ae2150ddd9c549854"
       },
-      "homepage": "https://prisma.io"
+      "homepage": "https://postiz.com/agent"
     }
   ]
 }