Creates only one issue for multiple identical fixme's on separate files

Again, thanks a lot for this action! We're using it on our project and it's helping a lot for cleaning the codebase.

One thing I just noticed is that if I add the same identical comment in two separate files, for example something like below, it will only add one issue.

// FIXME: Temporary decoding
// Real value should be integers. Currently having both options until backend fixes it.

The title and the value are correct and they get filled in the correct places, so no issues there, but at the end, I only get one GH issue added. I believe since they're in separate files, they should be two different issues.

Thanks!