`fuelup completions —shell bash` prints the config instead of applying them

### Problem

The completions do not work. It’s as if I have not run the command at all.
Running it in a new window and a new terminal session does not change this.
I have not sourced any files nor logged out / in.
There was no message indicating any further steps that I may need to take to make this work.

The verbose output has the following command at the end without any indication of what it does. Nevertheless, it did not work.

### Steps

Run the completion command

### Possible Solution(s)

Instead of printing to the stdout, do the installation or give clear instructions in next steps

### Notes

_No response_

### Fuelup version

```console
fuelup 0.20.0
```

### Installed components

```console
latest-aarch64-apple-darwin
forc - Up to date : 0.46.1
fuel-core - Up to date : 0.20.5
fuel-core-keygen - Error getting version string
fuel-indexer - Up to date : 0.24.3
fuelup - Update available : 0.20.0 -> 0.21.0
```