Fix JSON typo in manifest.json

Author: mizlan

website/public/manifest.json

@@ -6,7 +6,7 @@
       "src": "teachla-logo.svg",
       "sizes": "64x64 32x32 24x24 16x16",
       "type": "image/x-icon"
-    },
+    }
   ],
   "start_url": ".",
   "display": "standalone",