add OG image and description

Author: nianiB9

DocuSign.Workspaces/DocuSign.Workspaces/ClientApp/public/Workspaces-Sample-App-OG.jpg

@@ -7,6 +7,9 @@
     <meta name="theme-color" content="#000000" />
     <meta name="description" content="Web site created using create-react-app" />
     <link rel="apple-touch-icon" href="%PUBLIC_URL%/logo192.png" />
+    <meta property="og:title" content="Workspaces Sample App" />
+    <meta property="og:description" content="Explore how organizations use Workspaces to manage, share, and approve critical documents across teams and clients." />
+    <meta property="og:image" content="%PUBLIC_URL%/Workspaces-Sample-App-OG.jpg" />
     <!--
       manifest.json provides metadata used when your web app is installed on a
       user's mobile device or desktop. See https://developers.google.com/web/fundamentals/web-app-manifest/