Based on this link Modify robots.txt I decided to edit my robots.txt
So I went into the latest running version of Ghost
Here I edited the Robots.txt file to remove the line
Disallow: /p/ and re-uploaded it back up.
But when looking at my blog & refresh the page, it still has the link.
So then I SFTP back into the directory, and yes - the line is indeed gone.(But not from the website for whatever reason)
So, I’m not sure where it is actually picking robots.txt from.