Some links when they were being checked returned the http code 404,
but the links were working correctly.

This was happening because before the request the link was concatenated
with the / character at the end, making it a different link from the
original. If the original link didn't have a path that is
accessed by / at the end, it would return a 404 error.

This behavior made it a false negative.

This makes it possible to run the script to validate all links manually, via a button on the GitHub Actions panel. This will be useful for testing and when you need to run validation right away.

PR inactive

resolve #3037

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