Add link to spec page for 1-TEMPLATE task

[mandyWW]

1-TEMPLATE: Perhaps add a hint of a faster way of doing copying information needed from the race server into the template, as students may spend a lot of time trying to copy and paste the costs in bit by bit.

[davewhiteland]

Haven't edited any task texts yet — I know you've edited the tasks locally on the RHUL fork, so I'll bring those changes back in where it make sense as one commit later, go rather than piecemeal now.

[davewhiteland]

Specifically, the text "You could copy and paste the relevant parts of the HTML source code from the specification page on the race server into your template." could point out that

curl https://RACE-SERVER-URL/specs > the-specs.html

works (if you have curl)... so maybe this would be a nice tech note to add, looking into how to "get" source code from a page (dev tools on → Show page source)... maybe a good tech note would be How to switch dev tools on for Firefox/Chrome/Edge/Safari, because we've been seeing quite a lot of students not knowing how to use their browsers in this way.