Update VultModulesFree

manifests/VultModulesFree.json

@@ -5,6 +5,7 @@
   "authorEmail": "modlfo@gmail.com",
   "authorUrl": "http://modlfo.github.io",
   "pluginUrl": "https://github.com/modlfo/VultModules/releases",
+  "manualUrl": "https://modlfo.github.io/VultModules",
   "latestVersion": "0.6.9",
   "status": "available"
 }