Changelog: 2023-08-08

Clean up from the Hot HTML Summer to do list plus a bonus update.

Added rel="next" and rel="prev" to Project section pagination.
Changed instances of <section> where there was not a heading level to <div>. Interestingly found some correct usages on Project pages. Go me!
Added <nav> to the links in the footer.
Added robots.txt to block ChatGPT.
Update on 2023-08-10: updated the order of elements in the <head> based on Capo.