update dependencies for manager dashboard

[Hagellach37]

use the following:

<script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-app.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-auth.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-firestore.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-database.js"></script>
<script src="https://www.gstatic.com/firebasejs/8.10.0/firebase-storage.js"></script>

 <!-- add firebase -->
 <script src="https://www.gstatic.com/firebasejs/ui/6.0.0/firebase-ui-auth.js"></script>
 <link type="text/css" rel="stylesheet" href="https://www.gstatic.com/firebasejs/ui/6.0.0/firebase-ui-auth.css" />