import grafana provision function in /update route

brian_dashboard_manager/routes/update.py

-from flask import Blueprint, current_app, jsonify
+from flask import Blueprint, current_app
 from brian_dashboard_manager.routes import common
-from brian_dashboard_manager.grafana import *
+from brian_dashboard_manager.grafana.provision import provision
 from brian_dashboard_manager import CONFIG_KEY
 
 routes = Blueprint("update", __name__)