feat: Added uui-symbol-file-thumbnail component

Author: madsrasmussen

packages/uui-symbol-file-thumbnail/package.json

@@ -10,7 +10,7 @@
     "Lit",
     "Symbol File Thumbnail"
   ],
-  "description": "Umbraco UI symbol-file-thumbnail component",
+  "description": "Umbraco UI symbol-file-thumbnail component.",
   "repository": {
     "type": "git",
     "url": "https://github.com/umbraco/Umbraco.UI.git",