Fix broken link to HPC template files

[erictleung]

Summary

Reading through the manual, clicked on a link, and found it to be broken. I found the correct link and have replaced it here.

Related GitHub issues and pull requests

• Ref: N/A

Checklist

• [x] I understand and agree to this repository's code of conduct.
• [ ] I have listed any substantial changes in the development news.
• [x] This pull request is not a draft.

[wlandau-lilly]

Awesome, thanks!