FIX opengraph url tag

Author: wabscale

web/public/index.html

@@ -11,7 +11,7 @@
     <meta property="og:type" content="website">
     <meta property="og:title" content="Anubis LMS">
     <meta property="og:description" content="Distributed LMS for automating Computing Science Courses. Made for students by students.">
-    <meta property="og:url" content="https://anubis.osiris.cyber.nyu.edu/">
+    <meta property="og:url" content="https://anubis.osiris.services/">
     <meta property="og:site_name" content="Anubis LMS">
     <meta property="og:image" content="https://anubis.osiris.services/logo512.png">
     <meta property="og:image:secure_url" content="https://anubis.osiris.services/logo512.png">