[FIX] awesome_dashboard: Get rid of the deprecated warning

`json` routes were deprecated to `jsonrpc` in 19.0, let's
get rid of the warning to avoid confusion for the newdoos.

task-none

closes #1037

Signed-off-by: Antoine Vandevenne (anv) <anv@odoo.com>

Author: clbr-odoo

awesome_dashboard/controllers/controllers.py

@@ -9,7 +9,7 @@
 logger = logging.getLogger(__name__)
 
 class AwesomeDashboard(http.Controller):
-    @http.route('/awesome_dashboard/statistics', type='json', auth='user')
+    @http.route('/awesome_dashboard/statistics', type='jsonrpc', auth='user')
     def get_statistics(self):
         """
         Returns a dict of statistics about the orders: