URL is assumed to not contain query parameters

[ncatelli]

The line https://github.com/Ilshidur/action-discord/blob/master/entrypoint.js#L67 appends a ?wait=true query string. This assumes that all provided URLS will not contain a query string. For most cases this is not a problem. However this does prevent some actions, such as posting into a thread from being possible via this plugin.

This might be resolvable by checking if the URL contains a ? and setting the parameter prefix accordingly.