Updated formatting for printing the key for FSS (#4165)

Updated formatting for printing the key for FSS (#4165)

The key used to be jammed next to the local file path. Based on the format string on line 1675, I determined that the order of arguments was written incorrectly, and updated the function based on that assumption.

Before:
```
Please write down the following secret verification key. It should be stored
at a safe location and should not be saved locally on disk.

        /var/log/journal/9b47c1a5b339412887a197b7654673a7/fss8f66d6-f0a998-f782d0-1fe522/18fdb8-35a4e900

The sealing key is automatically changed every 15min.
```

After:
```
Please write down the following secret verification key. It should be stored
at a safe location and should not be saved locally on disk.

        d53ed4-cc43d6-284e10-8f0324/18fdb8-35a4e900

The sealing key is automatically changed every 15min.
```