The Usage section said use tab-delimited file but the samplesheet is actually comma-delimited

### Description of the bug

The Usage section said `To run on your data, prepare a tab-separated samplesheet with your input data.`
But the following line is actually in comma-delimited CSV format. Should it be made consistent?

### Command used and terminal output

```console

```

### Relevant files

_No response_

### System information

_No response_