WIP: Small Spelling Corrections

[harrietrs]

Description

I noticed a tiny spelling error on the ranks & classifies hazard. Added on a few more for good measure.

Checklist (contributor)

• [x] Marked as draft
• [x] Linked to issue
• [x] Filled in description
• [x] Gave this Pull Request a descriptive title

Checklist (maintainer)

• [ ] Built site locally.
• [ ] Changes are as discussed in issue.
• [ ] New pages are linked in the TOC/navigation?
• [ ] Have we added the contributor to our all-contributors?
• [ ] One sentence per line