Fix fastp PF.

[g-pacheco]

• This comment contains a description of changes (with reason)
• CHANGELOG.md has been updated

[ewels]

Tested before and after the change and I can see no effect in the report, as expected. So I'm happy 👍🏻

Please just add a line to the CHANGELOG.md file saying that you fixed a bug in the Fastp module with a link to the issue. Hopefully should be clear when you see how other changelog items are written.

Thanks!

Phil

[ewels]

Note (as this is your first ever PR) - no need to close the pull request or anything. Just commit + push the requested change to your branch and the pull request will automatically update with the additional changes.

[ewels]

1 commit for the actual bugfix, 5 commits for the changelog oneliner 😆 This is how it goes sometimes...