Fix: use api version > 7 for new custom field select format

src-ui/src/environments/environment.prod.ts

@@ -3,7 +3,7 @@ const base_url = new URL(document.baseURI)
 export const environment = {
   production: true,
   apiBaseUrl: document.baseURI + 'api/',
-  apiVersion: '6',
+  apiVersion: '7',
   appTitle: 'Paperless-ngx',
   version: '2.14.5',
   webSocketHost: window.location.host,

src-ui/src/environments/environment.ts

@@ -5,7 +5,7 @@
 export const environment = {
   production: false,
   apiBaseUrl: 'http://localhost:8000/api/',
-  apiVersion: '6',
+  apiVersion: '7',
   appTitle: 'Paperless-ngx',
   version: 'DEVELOPMENT',
   webSocketHost: 'localhost:8000',