Update webhook closed PR message link to clau.de

Replace the Google Forms link with the new plugin directory
submission link (https://clau.de/plugin-directory-submission).

https://claude.ai/code/session_01NxRDJKDvFR2d4wC4ppDEDT

.claude-plugin/marketplace.json

@@ -684,17 +684,6 @@
         "url": "https://github.com/semgrep/mcp-marketplace.git"
       },
       "homepage": "https://github.com/semgrep/mcp-marketplace.git"
-    },
-    {
-      "name": "wix",
-      "description": "Build, manage, and deploy Wix sites and apps. CLI development skills for dashboard extensions, backend APIs, site widgets, and service plugins with the Wix Design System, plus MCP server for site management.",
-      "category": "development",
-      "source": {
-        "source": "url",
-        "url": "https://github.com/wix/skills.git",
-        "sha": "15dda227e34959b1340e33bb9aede7e23a273f42"
-      },
-      "homepage": "https://dev.wix.com/docs/wix-cli/guides/development/about-wix-skills"
     }
   ]
 }