Avoid write-token requirements in fork PR

Author: William Weishuhn

.github/workflows/mcp-observatory.yml

@@ -16,4 +16,5 @@ jobs:
           target: .github/mcp-observatory/sequential-thinking.target.json
           deep: false
           security: true
-          comment-on-pr: true
+          comment-on-pr: false
+          set-status: false