Fix result bucket for GHA-triggered prod runs

I'm opening this issue following the adventure in https://github.com/AlexsLemonade/OpenScPCA-nf/issues/145. Two things to note:

1. We might update instructions in our release template to state that the manually issued `staging` run should be run _without_ `resume`. I had some caching problems the first time around there
2. Most importantly, there seems to be a bug in how the result bucket is named on GHA-triggered `prod` runs, but _not_ on manually-triggered `prod` runs. It's not immediately clear how this bug came to be since the associated files have not changed recently - the GHA yaml was last modified 2024-11 and `run_nextflow.sh` was last modified 2025-01 and we've had successful release runs since those dates.
- Editing to note that I did not carefully go through the logic rules in these scripts on my end when opening this issue