[Bug] Broken links in the New Iberia walkthrough page

[mrileyowens]

Describe the problem
Some of the hyperlinks on the walkthrough page (https://about.oldinsurancemaps.net/walkthrough/) are broken, either leading to a 404 page, or not causing anything except a change in the page's section URL. See the list below.

1. In the 'Overview' section containing the numbered list of hyperlinks to the following sections of the page, the 'Georeference and classify the "key map"' link does not jump to the appropriate section when clicked (perhaps because there is a missing 'e' in 'georeference' in the section link: '#georefernce-and-classify-the-key-map').
2. In the same list, the final section link, 'Make the final mosaic', also does not jump to the appropriate section when clicked.
3. Clicking the 'finding maps' link in the 'Find the map' section leads to a 404 page.
4. The 'Georeferencing' link in the first tip box of 'Georeference and classify the "key map"' links to a page about splitting maps, which I'm not sure was the intended behavior.

Expected behavior
The first two links should jump to different sections of the same page, and the last two appear to go to the wrong page.

Environment info:

• Device: laptop
• Operating System: Windows 10
• Browser: Google Chrome