Update Gumroad detection

src/technologies/g.json

@@ -2233,6 +2233,16 @@
     ],
     "description": "Gumroad is a self-publishing digital marketplace platform to sell digital services such as books, memberships, courses and other digital services.",
     "icon": "Gumroad.svg",
+    "dns": {
+      "CNAME": "\\.gumroad\\.com"
+    },
+    "dom": [
+      "iframe[src^='https://gumroad.com/l/']"
+    ],
+    "cookies": {
+      "_gumroad_app_session": "",
+      "_gumroad_guid": ""
+    },
     "js": {
       "GumroadOverlay": "",
       "createGumroadOverlay": ""
@@ -2241,7 +2251,11 @@
       "payg"
     ],
     "saas": true,
-    "scriptSrc": "gumroad\\.com/js/gumroad\\.js",
+    "scriptSrc": [
+      "gumroad\\.com/js/gumroad\\.js",
+      "gumroad\\.com/js/gumroad-embed\\.js",
+      "gumroad\\.com/packs/js/"
+    ],
     "website": "https://gumroad.com"
   },
   "Gumstack": {