Added ZenDesk Detect

src/apps.json

@@ -12315,6 +12315,23 @@
       "script": "v2\\.zopim\\.com",
       "website": "http://zopim.com"
     },
+    "Zendesk": {
+      "cats": [
+        1,
+        52,
+        61
+      ],
+      "headers": {
+        "x-zendesk-user-id": ""
+      },
+      "cookies": {
+        "_zendesk_cookie": "",
+        "_zendesk_shared_session": "",
+        "_help_center_session": ""
+      },
+      "icon": "Zendesk.png",
+      "website": "https://zendesk.com"
+    },
     "Zenfolio": {
       "cats": [
         7