Add mintlify to marketplace

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

https://claude.ai/code/session_01NxRDJKDvFR2d4wC4ppDEDT

Co-authored-by: Claude <noreply@anthropic.com>

.claude-plugin/marketplace.json

@@ -684,6 +684,17 @@
         "url": "https://github.com/semgrep/mcp-marketplace.git"
       },
       "homepage": "https://github.com/semgrep/mcp-marketplace.git"
+    },
+    {
+      "name": "mintlify",
+      "description": "Build beautiful documentation sites with Mintlify. Convert non-markdown files into properly formatted MDX pages, add and modify content with correct component use, and automate documentation updates.",
+      "category": "development",
+      "source": {
+        "source": "url",
+        "url": "https://github.com/mintlify/mintlify-claude-plugin.git",
+        "sha": "ce435be18a700dc849d6a63a80da4816d1e2128c"
+      },
+      "homepage": "https://www.mintlify.com/"
     }
   ]
 }

.github/workflows/close-external-prs.yml

@@ -36,7 +36,7 @@ jobs:
               owner: context.repo.owner,
               repo: context.repo.repo,
               issue_number: context.payload.pull_request.number,
-              body: `Thanks for your interest! This repo only accepts contributions from Anthropic team members. If you'd like to submit a plugin to the marketplace, please submit your plugin [here](https://docs.google.com/forms/d/e/1FAIpQLSdeFthxvjOXUjxg1i3KrOOkEPDJtn71XC-KjmQlxNP63xYydg/viewform).`
+              body: `Thanks for your interest! This repo only accepts contributions from Anthropic team members. If you'd like to submit a plugin to the marketplace, please submit your plugin [here](https://clau.de/plugin-directory-submission).`
             });
 
             await github.rest.pulls.update({