Update ForceToUseFakeDocument to false in appsettings.json

The `ForceToUseFakeDocument` property in the `Api` section of
`appsettings.json` was changed from `true` to `false`. This
modification alters the application's behavior to no longer
force the use of fake documents, potentially enabling the use
of real documents or other configurations as defined by the
application logic.

EnvelopeGenerator.ReceiverUI/wwwroot/appsettings.json

@@ -1,6 +1,6 @@
 {
   "Api": {
     "BaseUrl": "",
-    "ForceToUseFakeDocument": true
+    "ForceToUseFakeDocument": false
   }
 }