[BUG] - When "trailing slash" is in the url end, so the request is sent without it

[Gochip]

Describe the bug
When "trailing slash" is in the url end, so the request is sent without it

To Reproduce

1. fetch(window.WebviewProxy.convertProxyUrl("https://www.pabex.com/test/"))
2. This generate a request to https://www.pabex.com/test instead of https://www.pabex.com/test/

Expected behavior
Should generate a request to https://www.pabex.com/test/ (with trailing slash).