The "Plugin URI" header in the plugin file is not valid... except it is

My plugin Code Embed (see https://wordpress.org/plugins/simple-embed-code/) has the following URI in the header...

```
 * Plugin URI:        https://wordpress.org/plugins/simple-embed-code/
 ```

However, plugin check is reporting it as invalid.

Code: plugin_header_invalid_plugin_uri_domain
Message: The "Plugin URI" header in the plugin file is not valid.