chore: sync MCP manifest version to 3.6.0 (#606)

mcp/manifest.json

@@ -2,7 +2,7 @@
   "manifest_version": "0.3",
   "name": "last30days-pp-mcp",
   "display_name": "Last30Days",
-  "version": "3.0.0",
+  "version": "3.6.0",
   "description": "Research any topic across Reddit, X, YouTube, Hacker News, Polymarket, GitHub, and the web - last 30 days, scored by upvotes, likes, and real-money prediction-market odds.",
   "author": {
     "name": "Matt Van Horn",