fix: correct Fedora 40 detection, and be more verbose about version

The below snippet from ```1_prune.sh```: ``` # Merge /usr/etc to /etc # OSTree will error out if both dirs exist # And rpm-ostree will be confused and use only one of them if [ -d ./usr/etc ]; then echo echo WARNING: FOUND /usr/etc. MERGING TO ETC FOR COMPATIBILITY echo EXPECT PERMISSIONS ISSUES ON THE MERGED PATHS echo The following files from /usr/etc will be merged to /etc: tree ./usr/etc echo $RSYNC ./usr/etc/ ./etc rm -rf ./usr/etc fi # Move /etc to /usr/etc mv ./etc ./usr/ ``` seems to tell me that there *is* no ```/etc/os-release```, only a ```/usr/etc/os-release```, which means Fedora 40 images have been getting "detected" as "Fedora 40". I've also added some output for when Fedora 41+ gets detected.