Add missing levels to Open VSX WG

src/main/resources/working_groups.json

@@ -748,7 +748,20 @@
           "sponsorship": "https://www.eclipse.org/org/workinggroups/sponsorship/working-group-sponsorship-agreement.pdf",
           "contact_form": "https://accounts.eclipse.org/contact/membership"
       },
-      "levels": []
+      "levels": [
+        {
+          "relation": "WGSM",
+          "description": "Supporter Member"
+        },
+        {
+          "relation": "WGAPS",
+          "description": "Participant Member"
+        },
+        {
+          "relation": "WGSAP",
+          "description": "Guest Member"
+        }
+      ]
     }
   }
 }